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  1. Centered cube number
  2. PHP | array_udiff_uassoc() Function
  3. HTML | <th> valign Attribute
  4. HTML | <col> align Attribute
  5. Centered Dodecagonal Number
  6. PHP | array_intersect_ukey() Function
  7. HTML | DOM Input Range max Property
  8. PHP | ctype_print() Function
  9. Icosagonal number
  10. PHP | arsort() Function
  11. p5.js | noLoop() Function
  12. Centered Octadecagonal Number
  13. Sum and average of three numbers in PL/SQL
  14. Cake number
  15. Dodecagonal number
  16. Centered triangular number
  17. Strobogrammatic number
  18. Dodecahedral number
  19. Centered tetrahedral number
  20. Centered heptagonal number
  21. Program for Centered Icosahedral Number
  22. Centered Square Number
  23. Centered pentagonal number
  24. Centered Octahedral number
  25. Hexadecagonal number
  26. C# | EndsWith() Method
  27. Heptadecagonal number
  28. PHP | array_udiff() Function
  29. Centered Octagonal Number
  30. PHP | array_uintersect_assoc() Function
  31. Icosahedral Number
  32. PHP | array_diff_ukey() Function
  33. C# | Boxing And Unboxing
  34. p5.js | redraw() Function
  35. Enneadecagonal number
  36. Centered decagonal number
  37. PHP | array_intersect_uassoc() Function
  38. Centered nonadecagonal number
  39. PHP | array_udiff_assoc() Function
  40. Hendecagonal number
  41. Centered Pentadecagonal Number
  42. Centered dodecahedral number
  43. Centered Hexadecagonal Number
  44. Icosidigonal number
  45. Tetradecagonal number
  46. PHP | vsprintf() Function
  47. Centered tridecagonal number
  48. PHP | ctype_upper() Function
  49. PHP | ctype_digit() (Checks for numeric value)
  50. PHP | ctype_xdigit() Function
  51. PHP | ctype_space() Function
  52. PHP | ctype_alnum() (Check for Alphanumeric)
  53. PHP | ctype_punct() Function
  54. PHP | ctype_graph() Function
  55. PHP | ctype_alpha() (Checks for alphabetic value)
  56. PHP | ctype_cntrl() Function
  57. PHP | preg_grep() Function
  58. PHP | ereg_replace() Function
  59. Heptagonal number
  60. Pentatope number
  61. mktime() function in C++ STL
  62. PHP | Ds\Set allocate() Function
  63. PHP | Ds\Set capacity() Function
  64. HTML | <table> bgcolor Attribute
  65. PHP | convert_cyr_string() Function
  66. Program to find Simple Interest and Compound Interest in PL/SQL
  67. Area and Perimeter of Rectangle in PL/SQL
  68. Greatest number among three given numbers in PL/SQL
  69. Convert distance from km to meters and centimeters in PL/SQL
  70. Sum of digits equal to a given number in PL/SQL
  71. Area and Perimeter of a circle in PL/SQL
  72. PHP | random_bytes () Function
  73. PHP | random_int() Function
  74. Floyd's triangle in PL/SQL
  75. Count odd and even digits in a number in PL/SQL
  76. PHP | IntlChar::isJavaIDStart() Function
  77. PHP | IntlChar::isJavaSpaceChar() Function
  78. Perl | String Operators
  79. PHP | iconv() Function
  80. PHP | IntlChar::isdigit() Function
  81. C# | Math.Pow() Method
  82. PHP | IntlChar::isblank() Function
  83. C# | Math.Floor() Method
  84. C# | Math.Ceiling() Method
  85. PHP | IntlChar::isalpha() Function
  86. C# | Math Class Fields with Examples
  87. PHP | IntlChar::isbase() Function
  88. PHP | IntlChar::isalnum () Function
  89. C# | Char.TryParse () Method
  90. PHP | IntlChar::isUUppercase() Function
  91. PHP | IntlChar::isWhitespace() Function
  92. PHP | IntlChar::charDigitValue() Function
  93. PHP | IntlChar::isIDIgnorable() Function
  94. PHP | IntlChar::charName() Function
  95. PHP | IntlChar::charMirror() Function
  96. PHP | IntlChar::charAge() Function
  97. PHP | IntlChar::isUWhiteSpace() Function
  98. PHP | IntlChar::isUAlphabetic() Function
  99. PHP | IntlChar::isULowercase() Function
  100. PHP | IntlChar::isIDPart() Function
  101. PHP | IntlChar::isIDStart() Function
  102. PHP | IntlChar::isISOControl() Function
  103. PHP | IntlChar::totitle() Function
  104. PHP | IntlChar::isJavaIDPart() Function
  105. PHP | IntlChar::ord() Function
  106. PHP | IntlChar::chr() Function
  107. PHP | IntlChar::forDigit() Function
  108. Perl | Special Character Classes in Regular Expressions
  109. PHP | asort() Function
  110. PHP | krsort() Function
  111. PHP | ksort() Function
  112. C# | StartsWith() Method
  113. PHP | preg_split() Function
  114. C# | Math.DivRem() Method
  115. transform_inclusive_scan() function in C++
  116. HTML | <td> abbr Attribute
  117. HTML | <input> formtarget Attribute
  118. PHP | Ds\Set clear() Function
  119. PHP | Ds\Set contains() Function
  120. PHP | Ds\Set add() Function
  121. PHP | Ds\Set copy() Function
  122. HTML | <img> alt Attribute
  123. HTML | <img> align Attribute
  124. HTML | DOM Input Password select() Method
  125. HTML | DOM Input Range step Property
  126. HTML | DOM Input Range min Property
  127. HTML | <area> download Attribute
  128. PHP | intl_is_failure() Function
  129. HTML | <area> alt Attribute
  130. HTML | <area> href Attribute
  131. HTML | <area> hreflang Attribute
  132. HTML | <area> coords Attribute
  133. HTML | <area> type Attribute
  134. HTML | <area> rel Attribute
  135. HTML | <button> type Attribute
  136. HTML | <button> name Attribute
  137. HTML | <th> scope Attribute
  138. PHP | Ds\Map allocate() Function
  139. PHP | Ds\Map capacity() Function
  140. HTML | <a> shape Attribute
  141. HTML | <a> type Attribute
  142. HTML | <a> rel Attribute
  143. HTML | <a> download Attribute
  144. PHP | Ds\Map intersect() Function
  145. HTML | <a> charset Attribute
  146. PHP | Ds\Map __construct() Function
  147. PHP | Ds\Map count() Function
  148. PHP | Ds\Map diff() Function
  149. PHP | Ds\Map filter() Function
  150. PHP | Ds\Map get() Function
  151. PHP | Ds\Deque __construct() Function
  152. PHP | Ds\Deque shift() Function
  153. PHP | Ds\Deque unshift() Function
  154. HTML | <img> border Attribute
  155. HTML | <img> height Attribute
  156. HTML | <img> width Attribute
  157. HTML | <img> src Attribute
  158. HTML | <font> face Attribute
  159. HTML | <frameset> rows Attribute
  160. HTML | <canvas> height Attribute
  161. HTML | <font> size Attribute
  162. HTML | <table> frame Attribute
  163. HTML | <frame> src Attribute
  164. HTML | <font> color Attribute
  165. HTML | <hr> width Attribute
  166. HTML | <hr> size Attribute
  167. HTML | <hr> noshade Attribute
  168. HTML | <hr> align Attribute
  169. HTML | <progress> value Attribute
  170. HTML | <frameset> cols Attribute
  171. HTML | <col> width Attribute
  172. HTML | <p> align Attribute
  173. HTML <table> align Attribute
  174. HTML | <table> border Attribute
  175. HTML | <table> cellpadding Attribute
  176. HTML | <table> cellspacing Attribute
  177. HTML | <table> rules Attribute
  178. HTML | <table> summary Attribute
  179. HTML | <td> valign Attribute
  180. HTML | <table> width Attribute
  181. HTML | <tbody> align Attribute
  182. HTML | <tbody> valign Attribute
  183. HTML | <td> width Attribute
  184. HTML | <td> height Attribute
  185. PHP | SplDoublyLinkedList add() Function
  186. PHP | SplDoublyLinkedList bottom() Function
  187. PHP | SplDoublyLinkedList count() function
  188. PHP | SplDoublyLinkedList current() Function
  189. PHP | SplDoublyLinkedList isEmpty() Function
  190. PHP | SplDoublyLinkedList key() Function
  191. PHP | SplDoublyLinkedList next() Function
  192. PHP | SplDoublyLinkedList offsetExists() Function
  193. PHP | SplDoublyLinkedList offsetGet() Function
  194. PHP | SplDoublyLinkedList offsetSet() Function
  195. PHP | SplDoublyLinkedList offsetUnset() Function
  196. PHP | SplDoublyLinkedList pop() Function
  197. PHP | SplDoublyLinkedList prev() Function
  198. PHP | SplDoublyLinkedList push() Function
  199. PHP | SplDoublyLinkedList rewind() Function
  200. PHP | SplDoublyLinkedList shift() Function
  201. PHP | SplDoublyLinkedList top() Function
  202. PHP | SplDoublyLinkedList unshift() Function
  203. HTML | <td> align Attribute
  204. HTML | <td> bgcolor Attribute
  205. HTML | <td> axis Attribute
  206. HTML | <tr> align Attribute
  207. HTML | <td> char Attribute
  208. HTML | <tr> valign Attribute
  209. HTML | <tr> bgcolor Attribute
  210. HTML | <th> abbr Attribute
  211. HTML | <th> align Attribute
  212. HTML | <th> bgcolor Attribute
  213. HTML | <th> axis Attribute
  214. HTML | <th> width Attribute
  215. HTML | <th> height Attribute
  216. HTML | <th> rowspan Attribute
  217. HTML | <th> nowrap Attribute
  218. HTML | <tfoot> align Attribute
  219. HTML | <tfoot> valign Attribute
  220. HTML | canvas translate() Method
  221. HTML canvas rotate() Method
  222. HTML | canvas scale() Method
  223. HTML | <col> width Attribute
  224. HTML | <col> span Attribute
  225. HTML | <link> charset Attribute
  226. HTML | <input> align Attribute
  227. HTML | <video> autoplay Attribute
  228. HTML | <video> controls Attribute
  229. HTML | <video> height Attribute
  230. HTML | <video> loop Attribute
  231. HTML | <video> src Attribute
  232. HTML | <video> poster Attribute
  233. p5.js | stroke() Function
  234. p5.js | noFill() Function
  235. p.js | fill() Function
  236. p5.js | color() Function
  237. p5.js | circle() Function
  238. PHP | Ds\Stack capacity() Function
  239. PHP | Ds\Stack allocate() Function
  240. PHP | Ds\Pair clear() Function
  241. PHP | Ds\Stack count() Function
  242. PHP | Ds\Stack __construct() Function
  243. PHP | Ds\Pair copy() Function
  244. PHP | Ds\Deque contains() Function
  245. p5.js | point() Function
  246. PHP | Ds\Map remove() Function
  247. PHP | Ds\Pair toArray() Function
  248. PHP | Ds\Pair __construct() Function
  249. p5.js | rect() Function
  250. p5.js | square() Function
  251. p5.js | ellipseMode() Function
  252. CSS | brightness() Function
  253. CSS | blur() Function
  254. CSS | contrast() Function
  255. CSS | drop-shadow() Function
  256. CSS | grayscale() Function
  257. CSS | hue-rotate() Function
  258. CSS | invert() Function
  259. CSS | opacity() Function
  260. CSS | scaleX() Function
  261. CSS | rotate3d() Function
  262. CSS | scaleZ() Function
  263. CSS | rotate() Function
  264. CSS | scaleY() Function
  265. CSS | rotateZ() Function
  266. CSS | scale3d() Function
  267. CSS | scale() Function
  268. CSS | sepia() Function
  269. CSS | rotateX() Function
  270. CSS | rotateY() Function
  271. CSS | skew() Function
  272. CSS | skewX() Function
  273. CSS | skewY() Function
  274. CSS | url() Function
  275. CSS | translate() Function
  276. CSS | saturate() Function
  277. CSS | translateZ() function
  278. CSS | translateY() function
  279. CSS | translateX() Function
  280. CSS | translate3d() Function
  281. PHP | imagecolordeallocate() Function
  282. PHP | imagerotate() Function
  283. p5.js | drop() Function
  284. p5.js | size() Function
  285. p5.js | show() Function
  286. p5.js | value() Function
  287. p5.js | removeAttribute() Function
  288. p5.js | hide() Function
  289. p5.js | remove() Function
  290. PHP | imagescale() Function
  291. p5.js | center() Function
  292. p5.js | html() Function
  293. p5.js | position() Function
  294. p5.js | curve() function
  295. p5.js | curveDetail() Function
  296. CSS | matrix() Function
  297. CSS | matrix3d() Function
  298. p5.js | style() Function
  299. p5.js | child() Function
  300. p5.js | setup() Function
  301. p5.js | loop() Function
  302. p5.js | draw() Function
  303. HTML | <input> formenctype Attribute
  304. HTML | <input> type Attribute
  305. HTML | <link> target Attribute
  306. p5.js | parent() Function
  307. HTML | <img> usemap Attribute
  308. HTML | input formmethod Attribute
  309. HTML | input maxlength Attribute
You may use GeeksforGeeks CONTRIBUTE portal to help other geeks. For more info, please refer this.

  1. How to swap two numbers without using a temporary variable?
  2. Count the number of ways to tile the floor of size n x m using 1 x m size tiles
  3. Write a program to calculate pow(x,n)
  4. Program for Sum the digits of a given number
  5. How will you print numbers from 1 to 100 without using loop?
  6. Write a program to reverse digits of a number
  7. Given an array A[] and a number x, check for pair in A[] with sum as x
  8. Majority Element
  9. Smallest power of 2 greater than or equal to n
  10. Position of rightmost set bit
  11. Find the Missing Number
  12. Minimum number of jumps to reach end
  13. Search an element in a sorted and rotated array
  14. Count set bits in an integer
  15. Divide a string in N equal parts
  16. Median of two sorted arrays of same size
  17. Maximum sum such that no two elements are adjacent
  18. Check for Majority Element in a sorted array
  19. Find minimum number to be divided to make a number a perfect square
  20. Find whether a given number is a power of 4 or not
  21. Recursive Functions
  22. Maximum difference between two elements such that larger element appears after the smaller number
  23. Union and Intersection of two sorted arrays
  24. Total number of possible Binary Search Trees and Binary Trees with n keys
  25. Ceiling in a sorted array
  26. Equilibrium index of an array
  27. Find the two repeating elements in a given array
  28. Program for Fibonacci numbers
  29. Rabin-Karp Algorithm for Pattern Searching
  30. Find the smallest missing number
  31. Maximum Length Bitonic Subarray | Set 1 (O(n) time and O(n) space)
  32. A Boolean Matrix Question
  33. Average of a stream of numbers
  34. Count total set bits in all numbers from 1 to n
  35. Longest Non-palindromic substring
  36. Josephus problem | Set 1 (A O(n) Solution)
  37. Check whether two strings are anagram of each other
  38. Binomial Coefficient | DP-9
  39. Find a triplet that sum to a given value
  40. Find subarray with given sum | Set 1 (Nonnegative Numbers)
  41. Find the two numbers with odd occurrences in an unsorted array
  42. To find sum of two numbers without using any operator
  43. Draw a circle without floating point arithmetic
  44. XOR of all subarray XORs | Set 2
  45. Generate integer from 1 to 7 with equal probability
  46. Find four elements that sum to a given value | Set 1 (n^3 solution)
  47. Sort a nearly sorted (or K sorted) array
  48. Chinese Remainder Theorem | Set 1 (Introduction)
  49. Find the element that appears once
  50. Space and time efficient Binomial Coefficient
  51. Efficient program to calculate e^x
  52. Binary representation of a given number
  53. Efficient program to print all prime factors of a given number
  54. Swap all odd and even bits
  55. Find position of the only set bit
  56. Find the maximum repeating number in O(n) time and O(1) extra space
  57. Check if a number is Palindrome
  58. Find a peak element
  59. Print all possible combinations of r elements in a given array of size n
  60. Optimal Strategy for a Game | DP-31
  61. Print all possible strings of length k that can be formed from a set of n characters
  62. Find the maximum distance covered using n bikes
  63. Russian Peasant (Multiply two numbers using bitwise operators)
  64. Generate all unique partitions of an integer
  65. Count all possible paths from top left to bottom right of a mXn matrix
  66. Sort n numbers in range from 0 to n^2 - 1 in linear time
  67. Tail Recursion
  68. Remove minimum elements from either side such that 2*min becomes more than max
  69. Smallest subarray with sum greater than a given value
  70. Program for nth Catalan Number
  71. Swap two nibbles in a byte
  72. Find the smallest number whose digits multiply to a given number n
  73. Check if binary representation of a number is palindrome
  74. Count number of binary strings without consecutive 1's
  75. Calculate the angle between hour hand and minute hand
  76. Count Possible Decodings of a given Digit Sequence
  77. Count ways to reach the n'th stair
  78. Print squares of first n natural numbers without using *, / and -
  79. Given two strings, find if first string is a subsequence of second
  80. Print all increasing sequences of length k from first n natural numbers
  81. Print all elements in sorted order from row and column wise sorted matrix
  82. K'th Smallest/Largest Element in Unsorted Array | Set 2 (Expected Linear Time)
  83. Find Index of 0 to be replaced with 1 to get longest continuous sequence of 1s in a binary array
  84. Birthday Paradox
  85. How to check if an instance of 8 puzzle is solvable?
  86. Factorial of a large number
  87. Find length of period in decimal value of 1/n
  88. Greedy Algorithm for Egyptian Fraction
  89. Write an iterative O(Log y) function for pow(x, y)
  90. Calculate square of a number without using *, / and pow()
  91. Subtract two numbers without using arithmetic operators
  92. Given a sorted and rotated array, find if there is a pair with a given sum
  93. Print missing elements that lie in range 0 - 99
  94. Compute n! under modulo p
  95. Calculate 7n/8 without using division and multiplication operators
  96. Euclidean algorithms (Basic and Extended)
  97. Legendre's formula (Given p and n, find the largest x such that p^x divides n!)
  98. Euler's Totient Function
  99. Check if a number can be expressed as x^y (x raised to power y)
  100. Count frequencies of all elements in array in O(1) extra space and O(n) time
  101. Compute sum of digits in all numbers from 1 to n
  102. Find minimum number of coins that make a given value
  103. Find nth Magic Number
  104. Minimum steps to reach a destination
  105. Count factorial numbers in a given range
  106. Trapping Rain Water
  107. Find number of solutions of a linear equation of n variables
  108. Minimum Initial Points to Reach Destination
  109. Count of n digit numbers whose sum of digits equals to given sum
  110. Find the length of largest subarray with 0 sum
  111. Check if a given number is sparse or not
  112. Find maximum value of Sum( i*arr[i]) with only rotations on given array allowed
  113. Print a pattern without using any loop
  114. Square root of an integer
  115. Sum of bit differences among all pairs
  116. Count number of ways to partition a set into k subsets
  117. Find three closest elements from given three sorted arrays
  118. Generate Pythagorean Triplets
  119. Find XOR of two number without using XOR operator
  120. Modular Exponentiation (Power in Modular Arithmetic)
  121. Find the most frequent digit without using array/string
  122. Bell Numbers (Number of ways to Partition a Set)
  123. Multiplicative order
  124. Primality Test | Set 1 (Introduction and School Method)
  125. Euler's Totient function for all numbers smaller than or equal to n
  126. How to check whether a number is in the range[low, high] using one comparison ?
  127. Sum of Bitwise And of all pairs in a given array
  128. Count Derangements (Permutation such that no element appears in its original position)
  129. Primality Test | Set 2 (Fermat Method)
  130. Count number of ways to divide a number in 4 parts
  131. Zeckendorf's Theorem (Non-Neighbouring Fibonacci Representation)
  132. Count number of squares in a rectangle
  133. Compute nCr % p | Set 2 (Lucas Theorem)
  134. Chinese Remainder Theorem | Set 2 (Inverse Modulo based Implementation)
  135. Primality Test | Set 3 (Miller–Rabin)
  136. Euler's criterion (Check if square root under modulo p exists)
  137. Find Square Root under Modulo p | Set 1 (When p is in form of 4*i + 3)
  138. Count Inversions of size three in a given array
  139. Longest Span with same Sum in two Binary arrays
  140. Program for Bisection Method
  141. Program for Newton Raphson Method
  142. Swap two variables in one line in C/C++, Python, PHP and Java
  143. Find smallest values of x and y such that ax - by = 0
  144. Farey Sequence
  145. Check if count of divisors is even or odd
  146. Form minimum number from given sequence
  147. Find all divisors of a natural number | Set 1
  148. Longest Zig-Zag Subsequence
  149. Subarray/Substring vs Subsequence and Programs to Generate them
  150. Count number of subsets having a particular XOR value
  151. Frobenius coin problem
  152. Number of perfect squares between two given numbers
  153. Area of a polygon with given n ordered vertices
  154. Volume of cube using its space diagonal
  155. Check perfect square using addition/subtraction
  156. Find minimum difference between any two elements
  157. Find lost element from a duplicated array
  158. Print n x n spiral matrix using O(1) extra space
  159. How to check if an instance of 15 puzzle is solvable?
  160. Bitwise Hacks for Competitive Programming
  161. Count strings with consecutive 1's
  162. Linear Diophantine Equations
  163. Minimum number of palindromic subsequences to be removed to empty a binary string
  164. Inplace rotate square matrix by 90 degrees | Set 1
  165. Absolute distinct count in a sorted array
  166. Find all combinations that add upto given number
  167. Find the minimum difference between Shifted tables of two numbers
  168. Find smallest number with given number of digits and sum of digits
  169. Find the Largest number with given number of digits and sum of digits
  170. Sum of Fibonacci Numbers
  171. Minimax Algorithm in Game Theory | Set 1 (Introduction)
  172. Longest Common Increasing Subsequence (LCS + LIS)
  173. Find number of subarrays with even sum
  174. Maximum value K such that array has at-least K elements that are >= K
  175. Find even occurring elements in an array of limited range
  176. Program to add two fractions
  177. Count digits in a factorial | Set 1
  178. Converting Roman Numerals to Decimal lying between 1 to 3999
  179. Program for Armstrong Numbers
  180. Maximum sum of i*arr[i] among all rotations of a given array
  181. Generate 0 and 1 with 25% and 75% probability
  182. Find all triplets in a sorted array that forms Geometric Progression
  183. Print first n numbers with exactly two set bits
  184. Floor in a Sorted Array
  185. Find profession in a special family
  186. Implement rand3() using rand2()
  187. Check if an array can be Arranged in Left or Right Positioned Array
  188. Stein's Algorithm for finding GCD
  189. Direction at last square block
  190. Third largest element in an array of distinct elements
  191. Find Two Missing Numbers | Set 1 (An Interesting Linear Time Solution)
  192. Count digit groupings of a number with given constraints
  193. Non Fibonacci Numbers
  194. Non-crossing lines to connect points in a circle
  195. Change if all bits can be made same by single flip
  196. Swap three variables without using temporary variable
  197. Multiples of 3 or 7
  198. Carmichael Numbers
  199. Find the minimum value of m that satisfies ax + by = m and all values after m also satisfy
  200. Finding sum of digits of a number until sum becomes single digit
  201. Check whether a given number is even or odd
  202. Print sums of all subsets of a given set
  203. Length of the Longest Consecutive 1s in Binary Representation
  204. Gaussian Filter Generation in C++
  205. Sum of all proper divisors of a natural number
  206. Count number of solutions of x^2 = 1 (mod p) in given range
  207. Common Divisors of Two Numbers
  208. Repeated subtraction among two numbers
  209. Equal Sum and XOR
  210. Sum of all numbers that can be formed with permutations of n digits
  211. Josephus problem | Set 2 (A Simple Solution when k = 2)
  212. Largest palindrome which is product of two n-digit numbers
  213. Nth Even Fibonacci Number
  214. Even Fibonacci Numbers Sum
  215. Smallest number divisible by first n numbers
  216. Minimum number of increment/decrement operations such that array contains all elements from 1 to N
  217. Lucas Numbers
  218. Number of permutation with K inversions
  219. Multiples of 4 (An Interesting Method)
  220. Calculate XOR from 1 to n.
  221. n'th multiple of a number in Fibonacci Series
  222. n'th Pentagonal Number
  223. Harshad (Or Niven) Number
  224. Deficient Number
  225. Juggler Sequence
  226. Padovan Sequence
  227. Powerful Number
  228. Hexagonal Number
  229. Abundant Number
  230. Count numbers which can be constructed using two numbers
  231. Find element using minimum segments in Seven Segment Display
  232. Carol Number
  233. Multiplying a variable with a constant without using multiplication operator
  234. Find Maximum XOR value of a sub-array of size k
  235. Partition of a set into K subsets with equal sum
  236. Maximum difference of sum of elements in two rows in a matrix
  237. Count pairs in an array that hold i*arr[i] > j*arr[j]
  238. Minimum sum of two numbers formed from digits of an array
  239. The painter's partition problem
  240. Find sum of modulo K of first N natural number
  241. Chocolate Distribution Problem
  242. Program for Chocolate and Wrapper Puzzle
  243. Highest power of 2 less than or equal to given number
  244. Count natural numbers whose factorials are divisible by x but not y
  245. Find the first natural number whose factorial is divisible by x
  246. Check if two strings are k-anagrams or not
  247. GCD of two numbers formed by n repeating x and y times
  248. Efficient method for 2's complement of a binary string
  249. Program for Perrin numbers
  250. Sum of Perrin Numbers
  251. Smallest number with at least n trailing zeroes in factorial
  252. Minimum number of power terms with sum equal to n
  253. Last non-zero digit of a factorial
  254. Smallest number with at least n digits in factorial
  255. Print all possible consecutive numbers with sum N
  256. Double factorial
  257. Write a URL in a C++ program
  258. Find all elements in array which have at-least two greater elements
  259. K-th smallest element after removing some integers from natural numbers
  260. Count of acute, obtuse and right triangles with given sides
  261. Maximum path sum in a triangle.
  262. Find a subset with greatest geometric mean
  263. Minimum Sum Path In 3-D Array
  264. Sum of the products of all possible Subsets
  265. N-th root of a number
  266. Check if elements of array can be made equal by multiplying given prime numbers
  267. Generation of n numbers with given set of factors
  268. Find power of power under mod of a prime
  269. Sum of all Subarrays | Set 1
  270. Count trailing zero bits using lookup table
  271. Find all triplets with zero sum
  272. Print a matrix in alternate manner (left to right then right to left)
  273. Find the Rotation Count in Rotated Sorted array
  274. Efficiently check if a string has all unique characters without using any additional data structure
  275. Rearrange an array in maximum minimum form | Set 2 (O(1) extra space)
  276. Number with maximum number of prime factors
  277. Program to find Cullen Number
  278. Count passing car pairs
  279. Highway Billboard Problem
  280. Program for Banker's Algorithm | Set 1 (Safety Algorithm)
  281. Count all perfect divisors of a number
  282. N'th palindrome of K digits
  283. Check if a large number is divisible by 11 or not
  284. Check if a large number is divisible by 3 or not
  285. Count of strings that can be formed using a, b and c under given constraints
  286. Refactorable number
  287. Maximum sum of hour glass in matrix
  288. Number Theory | Generators of finite cyclic group under addition
  289. Maximum consecutive repeating character in string
  290. Check if a large number is divisible by 4 or not
  291. Superperfect Number
  292. Find ways an Integer can be expressed as sum of n-th power of unique natural numbers
  293. Find longest sequence of 1's in binary representation with one flip
  294. Prime points (Points that split a number into two primes)
  295. Check if a large number is divisible by 8 or not
  296. Count rotations divisible by 4
  297. Check whether K-th bit is set or not
  298. Toggling k-th bit of a number
  299. Search, insert and delete in an unsorted array
  300. Check if a large number is divisible by 9 or not
  301. Check if a larger number divisible by 36
  302. Recaman's sequence
  303. Check if frequency of each digit is less than the digit
  304. Count Divisors of n in O(n^1/3)
  305. Check if the door is open or closed
  306. Change bits to make specific OR value
  307. Largest number smaller than or equal to n and digits in non-decreasing order
  308. Maximum sum of a path in a Right Number Triangle
  309. Number of even substrings in a string of digits
  310. Place k elements such that minimum distance is maximized
  311. Find the next identical calendar year
  312. Nth Square free number
  313. Tidy Number (Digits in non-decreasing Order)
  314. Programs to print Interesting Patterns
  315. Check if a large number is divisible by 5 or not
  316. Temple Offerings
  317. Program to find Star number
  318. Multiply large integers under large modulo
  319. Compute nCr % p | Set 3 (Using Fermat Little Theorem)
  320. Left-Truncatable Prime
  321. Program to check Strong Number
  322. Draw a circle without floating point arithmetic
  323. Linear Search
  324. Solving f(n)= (1) + (2*3) + (4*5*6) ... n using Recursion
  325. Program to find sum of elements in a given array
  326. Program to find largest element in an array
  327. Program to cyclically rotate an array by one
  328. Program for factorial of a number
  329. Program to print all palindromes in a given range
  330. Decode a given pattern in two ways (Flipkart Interview Question)
  331. Given a number as a string, find the number of contiguous subsequences which recursively add up to 9
  332. Print first k digits of 1/n where n is a positive integer
  333. Efficient Program to Compute Sum of Series 1/1! + 1/2! + 1/3! + 1/4! + .. + 1/n!
  334. Program to find remainder without using modulo or % operator
  335. Remove repeated digits in a given number
  336. How to swap two bits in a given integer?
  337. How to compute mod of a big number?
  338. Program to check if a given number is Lucky (all digits are different)
  339. Check if a given number can be represented in given a no. of digits in any base
  340. Add two numbers using ++ and/or --
  341. Numbers whose bitwise OR and sum with N are equal
  342. Smallest Difference Triplet from Three arrays
  343. Reverse digits of an integer with overflow handled
  344. Maximum XOR value of a pair from a range
  345. Inserting m into n such that m starts at bit j and ends at bit i.
  346. Convert given time into words
  347. Generate k digit numbers with digits in strictly increasing order
  348. Find whether a subarray is in form of a mountain or not
  349. Count numbers whose sum with x is equal to XOR with x
  350. Given a number n, find the first k digits of n^n
  351. Determine whether a given number is a Hyperperfect Number
  352. Number of subarrays for which product and sum are equal
  353. Minimum steps to delete a string after repeated deletion of palindrome substrings
  354. Find Index of given fibonacci number in constant time
  355. Check a large number is divisible by 16 or not
  356. First digit in product of an array of numbers
  357. Check if a large number is divisible by 25 or not
  358. Primality Test | Set 4 (Solovay-Strassen)
  359. An efficient way to check whether n-th Fibonacci number is multiple of 10
  360. Fizz Buzz Implementation
  361. Determine if a string has all Unique Characters
  362. Find count of digits in a number that divide the number
  363. Find index of an extra element present in one sorted array
  364. Check if a number can be written as sum of three consecutive integers
  365. Count of m digit integers that are divisible by an integer n
  366. Maximum sum of distinct numbers such that LCM of these numbers is N
  367. Interesting facts about Fibonacci numbers
  368. Print numbers 1 to N using Indirect recursion
  369. Matrix Multiplication | Recursive
  370. Square root of a number using log
  371. Perfect cubes in a range
  372. Mean of array using recursion
  373. Find n-th element in a series with only 2 digits (4 and 7) allowed
  374. Automorphic Number
  375. Closest (or Next) smaller and greater numbers with same number of set bits
  376. Largest sum subarray with at-least k numbers
  377. Multiple of x closest to n
  378. Length Of Last Word in a String
  379. Sum of product of all pairs of array elements
  380. Largest Subset with GCD 1
  381. Check if two numbers are bit rotations of each other or not
  382. Set the K-th bit of a given number
  383. Fibonacci modulo p
  384. Next greater integer having one more number of set bits
  385. Count of smaller or equal elements in sorted array
  386. Check if a number is jumbled or not
  387. Print left rotation of array in O(n) time and O(1) space
  388. Find Index of 0 to be replaced with 1 to get longest continuous sequence of 1s in a binary array | Set-2
  389. Sum of all substrings of a string representing a number | Set 2 (Constant Extra Space)
  390. Program to calculate the value of sin(x) and cos(x)
  391. Counts paths from a point to reach Origin
  392. Numbers having Unique (or Distinct) digits
  393. Find Second largest element in an array
  394. Regular polygon using only 1s in a binary numbered circle
  395. Check if a number N starts with 1 in b-base
  396. Find the Missing Point of Parallelogram
  397. Count Balanced Binary Trees of Height h
  398. Recursive Programs to find Minimum and Maximum elements of array
  399. Find the sum of all the terms in the n-th row of the given series
  400. Program to print Sum of even and odd elements in an array
  401. Program to print Lower triangular and Upper triangular matrix of an array
  402. Find minimum value to assign all array elements so that array product becomes greater
  403. Find the Longest Increasing Subsequence in Circular manner
  404. Count pairs (a, b) whose sum of cubes is N (a^3 + b^3 = N)
  405. Search an element in an unsorted array using minimum number of comparisons
  406. Number of pairs in an array such that product is greater than sum
  407. Find if a number is divisible by every number in a list
  408. Cassini’s Identity
  409. Centered cube number
  410. Represent a given set of points by the best possible straight line
  411. Finding n-th number made of prime digits (2, 3, 5 and 7) only
  412. Find number of diagonals in n sided convex polygon
  413. Find all pairs (a, b) in an array such that a % b = k
  414. Fitting Shelves Problem
  415. Length of the transverse common tangent between the two non intersecting circles
  416. Rectangular (or Pronic) Numbers
  417. Discrete logarithm (Find an integer k such that a^k is congruent modulo b)
  418. Number of cells a queen can move with obstacles on the chessborad
  419. Number of n-digits non-decreasing integers
  420. Find maximum possible stolen value from houses
  421. Implementing ternary operator without any conditional statement
  422. Elements of an array that are not divisible by any element of another array
  423. Check if all bits of a number are set
  424. Check in binary array the number represented by a subarray is odd or even
  425. Replace every element of the array with BitWise XOR of all other
  426. Number of Groups of Sizes Two Or Three Divisible By 3
  427. Quickly find multiple left rotations of an array | Set 1
  428. Largest natural number that can be printed with M characters
  429. Position of rightmost different bit
  430. Program for Binary To Decimal Conversion
  431. Previous smaller integer having one less number of set bits
  432. Count number of strings (made of R, G and B) using given combination
  433. Count the numbers divisible by 'M' in a given range
  434. Divide the two given numbers by their common divisors
  435. Lexicographically smallest rotated sequence | Set 2
  436. Count number of triplets with product equal to given number
  437. Find two numbers from their sum and XOR
  438. Count pairs with Odd XOR
  439. Maximum product of subsequence of size k
  440. Program for Stirling Interpolation Formula
  441. Program for Decimal to Binary Conversion
  442. Program for decimal to octal conversion
  443. Unset bits in the given range
  444. Trailing number of 0s in product of two factorials
  445. Compute the parity of a number using XOR and table look-up
  446. Calculate maximum value using '+' or '*' sign between two numbers in a string
  447. Adam Number
  448. Program to check if input is an integer or a string
  449. Count number of pairs (A <= N, B <= N) such that gcd (A , B) is B
  450. Print last k digits of a^b (a raised to power b)
  451. Climb n-th stair with all jumps from 1 to n allowed (Three Different Approaches)
  452. Find an element in Bitonic array
  453. Check if an array contains all elements of a given range
  454. Equable Shapes
  455. Program to find HCF iteratively
  456. Rotate a Matrix by 180 degree
  457. Sum of the sequence 2, 22, 222, .........
  458. Find the smallest number with n set and m unset bits
  459. Maximize a given unsigned number number by swapping bits at it's extreme positions.
  460. Evil Number
  461. Find repeated character present first in a string
  462. Ways to remove one element from a binary string so that XOR becomes zero
  463. Program to check if a matrix is symmetric
  464. Find coordinates of a prime number in a Prime Spiral
  465. Sum of numbers with exactly 2 bits set
  466. Print a given matrix in zigzag form
  467. Number of N digit integers with weight W
  468. Zeller's Congruence | Find the Day for a Date
  469. Pell Number
  470. Largest even number possible by using one swap operation in given number
  471. Program to find sum of prime numbers between 1 to n
  472. Form the largest number using at most one swap operation
  473. Set bits in N equals to M in the given range.
  474. P-Smooth Numbers or P-friable Number
  475. Print 'K'th least significant bit of a number
  476. Subarray with XOR less than k
  477. Compute average of two numbers without overflow
  478. Twisted Prime Number
  479. Find minimum sum of factors of number
  480. Count ways to express a number as sum of consecutive numbers
  481. Print matrix in snake pattern
  482. Check if a given number is Pronic
  483. Find the number closest to n and divisible by m
  484. Mutual Recursion with example of Hofstadter Female and Male sequences
  485. Print all possible strings that can be made by placing spaces
  486. Number of days after which tank will become empty
  487. Print a matrix in a spiral form starting from a point
  488. Evaluate a boolean expression represented as string
  489. Extract 'k' bits from a given position in a number.
  490. Maximum sum of difference of adjacent elements
  491. Distributing M items in a circle of size N starting from K-th position
  492. A modified game of Nim
  493. Boundary elements of a Matrix
  494. Efficiently compute sums of diagonals of a matrix
  495. Sum of all subsequences of an array
  496. To check a number is palindrome or not without using any extra space
  497. Count ways to express a number as sum of powers
  498. Program that receives a number and prints it out in large size
  499. Recursive solution to count substrings with same first and last characters
  500. Find multiple of x closest to or a ^ b (a raised to power b)
  501. Number of unique rectangles formed using N unit squares
  502. Count of obtuse angles in a circle with 'k' equidistant points between 2 given points
  503. Find the n-th number whose binary representation is a palindrome
  504. Count ways to build street under given constraints
  505. Sum of array elements that is first continuously increasing then decreasing
  506. Greatest divisor which divides all natural number in range [L, R]
  507. Number of rectangles in N*M grid
  508. Program to check if three points are collinear
  509. Check whether all the bits are set in the given range
  510. Count even and odd digits in an Integer
  511. Toggle all bits after most significant bit
  512. Maximum sum bitonic subarray
  513. Check if a number is power of 8 or not
  514. Largest proper fraction with sum of numerator and denominator equal to a given number
  515. Find if it's possible to rotate the page by an angle or not.
  516. Symmetric difference of two sorted array
  517. Find most significant set bit of a number
  518. Count total bits in a number
  519. Composite Number
  520. Possible moves of knight
  521. Check whether all the bits are unset in the given range or not
  522. Check whether a number is circular prime or not
  523. Recursive Tower of Hanoi using 4 pegs / rods
  524. Program for sum of geometric series
  525. Golomb sequence
  526. Check if given array is almost sorted (elements are at-most one position away)
  527. Taxicab Numbers
  528. Count unset bits of a number
  529. Find element at given index after a number of rotations
  530. Geometric mean (Two Methods)
  531. Program to find the sum of a Series 1/1! + 2/2! + 3/3! + 4/4! +.......+ n/n!
  532. Largest K digit number divisible by X
  533. Smallest K digit number divisible by X
  534. Minimum product pair an array of positive Integers
  535. Difference between highest and least frequencies in an array
  536. Check if a number has bits in alternate pattern | Set-2 O(1) Approach
  537. Tribonacci Numbers
  538. To check whether a large number is divisible by 7
  539. Row-wise common elements in two diagonals of a square matrix
  540. Program to count digits in an integer (4 Different Methods)
  541. Number of ways to arrange N items under given constraints
  542. Maximum Possible Product in Array after performing given Operations
  543. Number of closing brackets needed to complete a regular bracket sequence
  544. Number of subarrays having product less than K
  545. Program for cube sum of first n natural numbers
  546. Minimum number of increment-other operations to make all array elements equal.
  547. Program for sum of arithmetic series
  548. Steps to make array empty by removing maximum and its right side
  549. Minimum and Maximum sum of absolute differences of pairs
  550. Program to print multiplication table of a number
  551. Check if a string is suffix of another
  552. Array element moved by k using single moves
  553. Program for diamond pattern with different layers
  554. Minimum Possible value of |ai + aj - k| for given array and k.
  555. Express an odd number as sum of prime numbers
  556. Minimum element whose n-th power is greater than product of an array of size n
  557. Sum of all subsets of a set formed by first n natural numbers
  558. Count of substrings of a binary string containing K ones
  559. Find the last digit when factorial of A divides factorial of B
  560. Longest alternating sub-array starting from every index in a Binary Array
  561. Number of compositions of a natural number
  562. Series with largest GCD and sum equals to n
  563. Check whether a number has exactly three distinct factors or not
  564. Program to find Sum of a Series a^1/1! + a^2/2! + a^3/3! + a^4/4! +…….+ a^n/n!
  565. Minimal operations to make a number magical
  566. Check if number is palindrome or not in Octal
  567. Happy Numbers
  568. Rearrange a binary string as alternate x and y occurrences
  569. Find all factorial numbers less than or equal to n
  570. Ways to color a 3*N board using 4 colors
  571. Unique cells in a binary matrix
  572. Check if a number is power of k using base changing method
  573. Leonardo Number
  574. Minimum cost to connect weighted nodes represented as array
  575. Check whether an array can be made strictly decreasing by modifying at most one element
  576. Smallest integer with digit sum M and multiple of N
  577. Mean of range in array
  578. Number of Binary Trees for given Preorder Sequence length
  579. Maximize the sum of arr[i]*i
  580. Maximize value of (a[i]+i)*(a[j]+j) in an array
  581. Count number of elements between two given elements in array
  582. Ways to express a number as product of two different factors
  583. Find single in an array of 2n+1 integer elements
  584. Program to find compound interest
  585. Programming puzzle (Assign value without any control statement)
  586. Program for Area Of Square
  587. Area of a triangle inscribed in a rectangle which is inscribed in an ellipse
  588. Minimum cost to sort a matrix of numbers from 0 to n^2 - 1
  589. Program to find Circumference of a Circle
  590. Print digit's position to be removed to make a number divisible by 6
  591. Check if the product of digit sum and its reverse equals the number or not
  592. Find the frequency of a number in an array
  593. Program for harmonic mean of numbers
  594. Sum of Binomial coefficients
  595. Program to find GCD of floating point numbers
  596. Count set bits in a range
  597. Find n-th term in the series 9, 33, 73,129 ...
  598. Program for Volume and Surface Area of Cuboid
  599. Maximum sum subsequence with at-least k distant elements
  600. Biggest integer which has maximum digit sum in range from 1 to n
  601. Program for weighted mean of natural numbers.
  602. Program to find correlation coefficient
  603. GCD of factorials of two numbers
  604. Modify a bit at a given position
  605. Spy Number (Sum and Products of Digits are same)
  606. Check if a number is Full Prime
  607. Find n-th term in the series 7, 15, 32, ...
  608. Check if two numbers are co-prime or not
  609. Recursive sum of digits of a number is prime or not
  610. Arc length from given Angle
  611. Ways to paint stairs with two colors such that two adjacent are not yellow
  612. Minimum number of elements to add to make median equals x
  613. Divisibility by 64 with removal of bits allowed
  614. Count ways to express even number ‘n’ as sum of even integers
  615. Maximum value with the choice of either dividing or considering as it is
  616. Game of N stones where each player can remove 1, 3 or 4
  617. Sum of digits of a given number to a given power
  618. Iterated Logarithm log*(n)
  619. Number of digits to be removed to make a number divisible by 3
  620. Only integer with positive value in positive negative value in array
  621. Program to check for Peterson number
  622. Minimum 1s to lend power to make whole array powerful
  623. Program to find remainder when large number is divided by 11
  624. Program to check for ISBN
  625. Representation of a number in powers of other
  626. Check whether the given array is perfect or not
  627. Ways to color a skewed tree such that parent and child have different colors
  628. Print Number series without using any loop
  629. Largest smaller number possible using only one swap operation
  630. Divisors of n-square that are not divisors of n
  631. Exponential Squaring (Fast Modulo Multiplication)
  632. Generate a pythagoras triplet from a single integer
  633. Total no of 1's in numbers
  634. Products of ranges in an array
  635. Given a large number, check if a subsequence of digits is divisible by 8
  636. Number of subsequences as "ab" in a string repeated K times
  637. Maximum of smallest possible area that can get with exactly k cut of given rectangular
  638. Finding the best fit rectangle that covers a given point
  639. Icosagonal number
  640. Pair formation such that maximum pair sum is minimized
  641. Check whether a number can be represented by sum of two squares
  642. Maximum and Minimum value of a quadratic function
  643. Count different numbers that can be generated such that there digits sum is equal to 'n'
  644. Minimum gcd operations to make all array elements one
  645. Prime factors of a big number
  646. One line function for factorial of a number
  647. Find element in array that divides all array elements
  648. Program to swap upper diagonal elements with lower diagonal elements of matrix.
  649. Check if a number is positive, negative or zero using bit operators
  650. Check if a large number is divisible by 13 or not
  651. Smallest number whose set bits are maximum in a given range
  652. Minimize (max(A[i], B[j], C[k]) - min(A[i], B[j], C[k])) of three different sorted arrays
  653. Find combined mean and variance of two series
  654. Largest number with binary representation is m 1's and m-1 0's
  655. Prime Numbers
  656. Deserium Number
  657. Probability of a random pair being the maximum weighted pair
  658. Number of n digit stepping numbers
  659. Find if a number is part of AP whose first element and difference are given
  660. Program to find the minimum (or maximum) element of an array
  661. Find n-th term in series 1 2 2 3 3 3 4 4 4 4....
  662. Find the sum of the series 1+11+111+1111+..... upto n terms
  663. Sum of the Series 1 + x/1 + x^2/2 + x^3/3 + .. + x^n/n
  664. Find n-th term of series 1, 3, 6, 10, 15, 21...
  665. Sum of the series 1, 3, 6, 10... (Triangular Numbers)
  666. Program to calculate distance between two points
  667. Find trace of matrix formed by adding Row-major and Column-major order of same matrix
  668. n-th term in series 2, 12, 36, 80, 150....
  669. Program to find smallest difference of angles of two parts of a given circle
  670. Check for integer overflow on multiplication
  671. Even-odd turn game with two integers
  672. Sum of first n even numbers
  673. Program to find the number of region in Planar Graph
  674. Sum of squares of first n natural numbers
  675. Sum of natural numbers using recursion
  676. Schröder–Hipparchus number
  677. The painter's partition problem | Set 2
  678. Find the number of stair steps
  679. Sexy Prime
  680. Program to find third side of triangle using law of cosines
  681. Narcissistic number
  682. Count pairs in array whose sum is divisible by 4
  683. Program to determine the quadrant of the cartesian plane
  684. Motzkin number
  685. Probability of choosing a random pair with maximum sum in an array
  686. AKS Primality Test
  687. N-th polite number
  688. Find first and last digits of a number
  689. Break a number such that sum of maximum divisors of all parts is minimum
  690. Count numbers with unit digit k in given range
  691. Sum of squares of first n natural numbers
  692. Find last index of a character in a string
  693. Count of suffix increment/decrement operations to construct a given array
  694. Program to compute division upto n decimal places
  695. Check whether second string can be formed from characters of first string
  696. Program to check if tank will overflow, underflow or filled in given time
  697. Maximize volume of cuboid with given sum of sides
  698. Newman–Shanks–Williams prime
  699. Program to check if matrix is lower triangular
  700. Program to find Perimeter / Circumference of Square and Rectangle
  701. Largest number that divides x and is co-prime with y
  702. Pascal Matrix
  703. Check if given number is Emirp Number or not
  704. Minimum insertions to make a Co-prime array
  705. Program to check if water tank overflows when n solid balls are dipped in the water tank
  706. Find largest prime factor of a number
  707. Program for Binomial Coefficients table
  708. Rearrange array such that even positioned are greater than odd
  709. Sum of the series 1 + (1+2) + (1+2+3) + (1+2+3+4) + ...... + (1+2+3+4+...+n)
  710. Count number of increasing subsequences of size k
  711. Sum of all divisors from 1 to n
  712. Minimum flip required to make Binary Matrix symmetric
  713. Sum of Manhattan distances between all pairs of points
  714. Decimal to binary number using recursion
  715. Check if n is divisible by power of 2 without using arithmetic operators
  716. Multiplication with a power of 2
  717. Section formula (Point that divides a line in given ratio)
  718. Find the distance covered to collect items at equal distances
  719. Program to calculate area and volume of a Tetrahedron
  720. Maximum binomial coefficient term value
  721. Sum of digit of a number using recursion
  722. Program to print triangular number series till n
  723. Program to convert given number of days in terms of Years, Weeks and Days
  724. Leibniz harmonic triangle
  725. Maximum possible elements which are divisible by 2
  726. Check whether given floating point number is even or odd
  727. Euler Method for solving differential equation
  728. Program for triangular patterns of alphabets
  729. Find last k digits in product of an array numbers
  730. Binary to Gray code using recursion
  731. Find nth Fibonacci number using Golden ratio
  732. Check if it is possible to make array equal by doubling or tripling
  733. Count subsequence of length three in a given string
  734. Program to get the Sum of series: 1 - x^2/2! + x^4/4! -.... upto nth term
  735. Special two digit number
  736. Program to find the sum of a Series (1*1) + (2*2) + (3*3) + (4*4) + (5*5) + ... + (n*n)
  737. Trinomial Triangle
  738. Value of k-th index of a series formed by append and insert MEX in middle
  739. Newman-Conway Sequence
  740. Round the given number to nearest multiple of 10
  741. Twin Prime Numbers
  742. Program to print characters present at prime indexes in a given string
  743. Program for Simpson's 1/3 Rule
  744. Program to find sum of series 1 + 2 + 2 + 3 + 3 + 3 + . . . + n
  745. Sum of squares of binomial coefficients
  746. Sum of the series 2 + (2+4) + (2+4+6) + (2+4+6+8) + …… + (2+4+6+8+….+2n)
  747. Sum of Arithmetic Geometric Sequence
  748. Range Query on array whose each element is XOR of index value and previous element
  749. Check if array contains contiguous integers with duplicates allowed
  750. Decagonal Numbers
  751. Program to determine focal length of a spherical mirror
  752. Count numbers in range L-R that are divisible by all of its non-zero digits
  753. Count ways to reach the nth stair using step 1, 2 or 3
  754. Find remainder of array multiplication divided by n
  755. Program for Stair Case Patterns
  756. Check if all digits of a number divide it
  757. Find last element after deleting every second element in array of n integers
  758. Find the average of first N natural numbers
  759. Program to convert Centimeter to Feet and Inches
  760. Recursive sum of digit in n^x, where n and x are very large
  761. Possible to make a divisible by 3 number using all digits in an array
  762. Program to print the pattern ‘D’
  763. Kronecker Product of two matrices
  764. C Program for Find the perimeter of a cylinder
  765. Program to calculate area of a Tetrahedron
  766. Median and Mode using Counting Sort
  767. Aliquot sum
  768. Find unit digit of x raised to power y
  769. Jacobsthal and Jacobsthal-Lucas numbers
  770. Product of 2 Numbers using Recursion
  771. Sum of fourth powers of the first n natural numbers
  772. Number of substrings with odd decimal value in a binary string
  773. Closest numbers from a list of unsorted integers
  774. Sum of the series 0.6, 0.06, 0.006, 0.0006, ...to n terms
  775. Sum of the series 0.7, 0.77, 0.777, ... upto n terms
  776. Wave Patterns
  777. Smallest number with sum of digits as N and divisible by 10^N
  778. Program to check diagonal matrix and scalar matrix
  779. Sum of fifth powers of the first n natural numbers
  780. Sum of fourth power of first n even natural numbers
  781. Trimorphic Number
  782. Perfect Square String
  783. Print the pyramid pattern with given height and minimum number of stars
  784. Count number of trailing zeros in product of array
  785. Find the position of the last removed element from the array
  786. Generate all the binary number from 0 to n
  787. Toggle bits of a number except first and last bits
  788. Count square and non-square numbers before n
  789. Program to print non square numbers
  790. Sum of fourth powers of first n odd natural numbers
  791. Making elements distinct in a sorted array by minimum increments
  792. Find the Number which contain the digit d
  793. Find N integers with given difference between product and sum
  794. Find if it is possible to get a ratio from given ranges of costs and quantities
  795. First uppercase letter in a string (Iterative and Recursive)
  796. Check if the given number K is enough to reach the end of an array
  797. Maximum difference of zeros and ones in binary string | Set 2 (O(n) time)
  798. Program to implement t-test
  799. Set all odd bits of a number
  800. Cartesian Product of Two Sets
  801. Sum of the alphabetical values of the characters of a string
  802. Sum of series 2/3 - 4/5 + 6/7 - 8/9 + ------- upto n terms
  803. Average of first n odd naturals numbers
  804. Average of first n even natural numbers
  805. Sum of the series 1 / 1 + (1 + 2) / (1 * 2) + (1 + 2 + 3) / (1 * 2 * 3) + - - - - - - upto n terms.
  806. Set all even bits of a number
  807. Space efficient iterative method to Fibonacci number
  808. Divisibility by 12 for a large number
  809. Sum of series 1^2 + 3^2 + 5^2 + . . . + (2*n - 1)^2
  810. Program to find the mid-point of a line
  811. Print Fibonacci Series in reverse order
  812. Square Free Number
  813. Number of distinct subsets of a set
  814. Recursive program for prime number
  815. Count pairs from two sorted matrices with given sum
  816. Find the center of the circle using endpoints of diameter
  817. Leaf nodes from Preorder of a Binary Search Tree (Using Recursion)
  818. Nonagonal number
  819. Tomohiko Sakamoto's Algorithm- Finding the day of the week
  820. Remove all outgoing edges except edge with minimum weight
  821. Sum of Series (n^2-1^2) + 2(n^2-2^2) +....n(n^2-n^2)
  822. Check if a number is sandwiched between primes
  823. Print a matrix in Reverse Wave Form
  824. Minimum number of mails required to distribute all the questions
  825. Find n-th term of series 3, 9, 21, 41, 71...
  826. Program to check Plus Perfect Number
  827. Area of a Hexagon
  828. Sum of the series 5+55+555+.. up to n terms
  829. Sum of consecutive two elements in a array
  830. Inverse Permutation
  831. Program to print Swastika Pattern
  832. Front and Back Search in unsorted array
  833. Non-Repeating Element
  834. Check if a given circle lies completely inside the ring formed by two concentric circles
  835. Program for N-th term of Geometric Progression series
  836. Time when minute hand and hour hand coincide
  837. Area of hexagon with given diagonal length
  838. Sum of largest divisible powers of p (a prime number) in a range
  839. Maximum XOR-value of at-most k-elements from 1 to n
  840. Fast average of two numbers without division
  841. Program for N-th term of Arithmetic Progression series
  842. Octahedral Number
  843. Program to print GP (Geometric Progression)
  844. Program to print Arithmetic Progression series
  845. Check if given number is perfect square
  846. Maximum sum of increasing order elements from n arrays
  847. Primality Test | Set 5(Using Lucas-Lehmer Series)
  848. Minimum swaps required to bring all elements less than or equal to k together
  849. Check whether a given matrix is orthogonal or not
  850. Power of a prime number ‘r’ in n!
  851. Print bitwise AND set of a number N
  852. Division without using '/' operator
  853. Print first n Fibonacci Numbers using direct formula
  854. N-th term of George Cantor set of rational numbers
  855. Find square root of number upto given precision using binary search
  856. Sum of n digit numbers divisible by a given number
  857. Check if a line passes through the origin
  858. Product of given N fractions in reduced form
  859. Rencontres Number (Counting partial derangements)
  860. Fermat's Last Theorem
  861. Program to calculate area of Circumcircle of an Equilateral Triangle
  862. Probability for three randomly chosen numbers to be in AP
  863. Sum of pairwise products
  864. Find the only repetitive element between 1 to n-1
  865. Number of subarrays with given product
  866. Find n-th Fortunate Number
  867. Sum of each element raised to (prime-1) % prime
  868. Invert actual bits of a number
  869. Coordinates of rectangle with given points lie inside
  870. Undulating numbers
  871. Number of palindromic permutations | Set 1
  872. Centered Octadecagonal Number
  873. LCM of factorial and its neighbors
  874. Product of unique prime factors of a number
  875. Find sum of Series with n-th term as n^2 - (n-1)^2
  876. Minimum removals to make array sum even
  877. Variance and standard-deviation of a matrix
  878. Inclusion Exclusion principle and programming applications
  879. Triangular Matchstick Number
  880. Smallest triangular number larger than p
  881. Smallest even digits number not less than N
  882. Find n-th element from Stern's Diatomic Series
  883. Largest even digit number not greater than N
  884. Almost Perfect Number
  885. Count numbers from range whose prime factors are only 2 and 3
  886. Number with even sum of digits
  887. Sum of product of each element with each element after it
  888. Square pyramidal number (Sum of Squares)
  889. Squared triangular number (Sum of cubes)
  890. N-th number which is both a square and a cube
  891. Reach A and B by multiplying them with K and K^2 at every step
  892. Center element of matrix equals sums of half diagonals
  893. First digit in factorial of a number
  894. Number of integers with odd number of set bits
  895. Number of solutions to Modular Equations
  896. Legendre's Conjecture
  897. Decimal Equivalent of Gray Code and its Inverse
  898. Smallest greater elements in whole array
  899. Cube Free Numbers smaller than n
  900. Finding a Non Transitive Coprime Triplet in a Range
  901. Space optimization using bit manipulations
  902. Maximum Subarray Sum Excluding Certain Elements
  903. Equalizing array using increment under modulo 3
  904. Euler's Four Square Identity
  905. Tetrahedral Numbers
  906. Find duplicates in constant array with elements 0 to N-1 in O(1) space
  907. Bertrand's Postulate
  908. Number of subarrays having sum less than K
  909. Brahmagupta Fibonacci Identity
  910. Height of a complete binary tree (or Heap) with N nodes
  911. Reaching a point using clockwise or anticlockwise movements
  912. Maximum difference between groups of size two
  913. DFA for Strings not ending with "THE"
  914. Program to check if first and the last characters of string are equal
  915. Ways to split string such that each partition starts with distinct character
  916. Check if it possible to partition in k subarrays with equal sum
  917. Check if two people starting from different points ever meet
  918. Prime String
  919. Check whether a number is Emirpimes or not
  920. Number of prefix sum prime in given range query
  921. Number of Digits in a^b
  922. Moser-de Bruijn Sequence
  923. Hardy-Ramanujan Theorem
  924. Lagrange's four square theorem
  925. Nesbitt's Inequality
  926. Possible two sets from first N natural numbers difference of sums as D
  927. Sum of digits written in different bases from 2 to n-1
  928. Ways to multiply n elements with an associative operation
  929. Bitwise recursive addition of two integers
  930. Blum Integer
  931. Program for sum of cos(x) series
  932. Making zero array by decrementing pairs of adjacent
  933. Program for scalar multiplication of a matrix
  934. Check a number is odd or even without modulus operator
  935. Maximize array elements upto given number
  936. Repeated Unit Divisibility
  937. Maximum sum increasing subsequence from a prefix and a given element after prefix is must
  938. Sum of range in a series of first odd then even natural numbers
  939. Finding n-th term of series 3, 13, 42, 108, 235…
  940. Powers of 2 to required sum
  941. Check if all occurrences of a character appear together
  942. Sub array sum is prime or not
  943. Number of ways an array can be filled with 0s and 1s such that no consecutive elements are 1
  944. Check divisibility of binary string by 2^k
  945. Minimum product subset of an array
  946. Multiply any Number with 4 using Bitwise Operator
  947. Program to print Collatz Sequence
  948. Divisibility by 3 where each digit is the sum of all prefix digits modulo 10
  949. Program to print all the numbers divisible by 3 and 5 for a given number
  950. Maximum equlibrium sum in an array
  951. Making elements of two arrays same with minimum increment/decrement
  952. Maximum height of triangular arrangement of array values
  953. Program to print Reverse Floyd's triangle
  954. Minimum operations to make GCD of array a multiple of k
  955. Number of digits in the nth number made of given four digits
  956. Find a permutation such that number of indices for which gcd(p[i], i) > 1 is exactly K
  957. Cake number
  958. Dodecagonal number
  959. Centered triangular number
  960. Swapping four variables without temporary variable
  961. Dodecahedral number
  962. Centered tetrahedral number
  963. Centered heptagonal number
  964. Program for Centered Icosahedral Number
  965. Centered pentagonal number
  966. Centered Octahedral number
  967. Check if sum of divisors of two numbers are same
  968. Program to reverse a string (Iterative and Recursive)
  969. Hexadecagonal number
  970. Heptadecagonal number
  971. Pentatope number
  972. Sum of series 1*1! + 2*2! + ……..+ n*n!
  973. Product of first N factorials
  974. Centered Octagonal Number
  975. Icosahedral Number
  976. Enneadecagonal number
  977. Centered decagonal number
  978. Construct array having X subsequences with maximum difference smaller than d
  979. Centered nonadecagonal number
  980. Check if it is possible to make the given matrix increasing matrix or not
  981. Hendecagonal number
  982. Number of arrays of size N whose elements are positive integers and sum is K
  983. Centered Pentadecagonal Number
  984. Ways to choose three points with distance between the most distant points <= L
  985. Centered dodecahedral number
  986. Centered Hexadecagonal Number
  987. Icosidigonal number
  988. Tetradecagonal number
  989. Program to convert centimeter into meter and kilometer
  990. Centered tridecagonal number
  991. Minimum cost to equal all elements of array using two operation
  992. Number expressed as sum of five consecutive integers
  993. Number of digits in N factorial to the power N
  994. Set the rightmost unset bit
  995. Check if given number is a power of d where d is a power of 2
  996. How to turn on a particular bit in a number?
  997. K-th smallest element after removing given integers from natural numbers | Set 2
  998. Pentagonal Pyramidal Number
  999. Maximize the bitwise OR of an array
  1000. Check if mirror image of a number is same if displayed in seven segment display
  1001. Number of Distinct Meeting Points on a Circular Road
  1002. Check if array sum can be made K by three operations on it
  1003. Sum of product of consecutive Binomial Coefficients
  1004. Check if the n-th term is odd or even in a Fibonacci like sequence
  1005. Heptagonal number
  1006. Pentatope number
  1007. Make array elements equal in Minimum Steps
  1008. Maximum Sum Decreasing Subsequence
  1009. Multiply the given number by 2 such that it is divisible by 10
  1010. Program to find greater value between a^n and b^n
  1011. Number of elements with even factors in the given range
  1012. Print all pairs with given sum
  1013. Print all triplets with given sum
  1014. Number of ones in the smallest repunit
  1015. Number of squares of maximum area in a rectangle
  1016. Stormer Numbers
  1017. Check if array can be divided into two sub-arrays such that their absolute difference is K
  1018. Compute power of power k times % m
  1019. Program to check similarity of given two triangles
  1020. Program to calculate the Surface Area of a Triangular Prism
  1021. Maximum number by concatenating every element in a rotation of an array
  1022. Memoization (1D, 2D and 3D)
  1023. Number of triangles in a plane if no more than two points are collinear
  1024. Make all numbers of an array equal
  1025. Remove leading zeros from an array
  1026. Number of odd and even results for every value of x in range [min, max] after performing N steps
  1027. Reduce string to shortest length by deleting a pair of same adjacent characters
  1028. Total number of ways to place X and Y at n places such that no two X are together
  1029. Maximum number of ones in a N*N matrix with given constraints
  1030. Program to find the Area and Volume of Icosahedron
  1031. Element which occurs consecutively in a given subarray more than or equal to K times
  1032. Check if concatenation of two strings is balanced or not
  1033. Sum of all elements up to Nth row in a Pascal triangle
  1034. Check if a number has same number of set and unset bits
  1035. Check if the large number formed is divisible by 41 or not
  1036. Program to determine the octant of the axial plane
  1037. Number of different cyclic paths of length N in a tetrahedron
  1038. Find the Nth Mosaic number
  1039. Find index of first occurrence when an unsorted array is sorted
  1040. Mirror of a point through a 3 D plane
  1041. Print all the combinations of N elements by changing sign such that their sum is divisible by M
  1042. Sorting without comparison of elements
  1043. Sum of similarities of string with all of its suffixes
  1044. Find the multiple of x which is closest to a^b
  1045. Calculating n-th real root using binary search
  1046. Maximum power of jump required to reach the end of string
  1047. Check if bits in range L to R of two numbers are complement of each other or not
  1048. Longest subsequence whose average is less than K
  1049. Convert time from 24 hour clock to 12 hour clock format
  1050. Count pairs with Bitwise XOR as ODD number
  1051. Tetranacci Numbers
  1052. Count the number of pairs that have column sum greater than row sum
  1053. Check if a number is in given base or not
  1054. Number of possible pairs of Hypotenuse and Area to form right angled triangle
  1055. Modulus of all pairwise consecutive elements in an Array
  1056. Find the Missing Number in a sorted array
  1057. Maximum set bit sum in array without considering adjacent elements
  1058. Comparing leading zeros in binary representations of two numbers
  1059. Find sum of inverse of the divisors when sum of divisors and the number is given
  1060. Minimum element in a max heap
  1061. Majority element in a circular array of 0's and 1's
  1062. Value in a given range with maximum XOR
  1063. Count number of triplets with product equal to given number | Set 2
  1064. Ways to place K bishops on an N×N chessboard so that no two attack
  1065. Count pairs in a sorted array whose product is less than k
  1066. Program to check whether 4 points in a 3-D plane are Coplanar
  1067. Find the largest twins in given range
  1068. Number of divisors of a given number N which are divisible by K
  1069. Number of prime pairs in an array
  1070. Find Multiples of 2 or 3 or 5 less than or equal to N
  1071. 2's compliment for a givin string using XOR
  1072. Recursive program to print triangular patterns
  1073. Find the number after successive division
  1074. Program to calculate Root Mean Square
  1075. Find any pair with given GCD and LCM
  1076. Count the number of ways to traverse a Matrix
  1077. Count number of integers less than or equal to N which has exactly 9 divisors
  1078. Count Unary Numbers in a Range
  1079. Find number of magical pairs of string of length L
  1080. Count the number of carry operations required to add two numbers
  1081. Number of values of b such that a = b + (a^b)
  1082. Program to find the Nth Harmonic Number
  1083. Program to find the Radius of the incircle of the triangle
  1084. Program to calculate the value of nCr Efficiently
  1085. Check if an array is Wave Array
  1086. Find 'N' number of solutions with the given inequality equations
  1087. Minimum changes required to make first string substring of second string
  1088. Print a number strictly less than a given number such that all its digits are distinct.
  1089. Number of solutions of n = x + n ⊕ x
  1090. Area of a circle inscribed in a rectangle which is inscribed in a semicircle
  1091. Sum of first N natural numbers by taking powers of 2 as negative number
  1092. Check if a number has digits in the given Order
  1093. How to access elements of a Square Matrix
  1094. Area of a square inscribed in a circle which is inscribed in a hexagon
  1095. Subset array sum by generating all the subsets
  1096. Sum of the first N Prime numbers
  1097. Radius of the biggest possible circle inscribed in rhombus which in turn is inscribed in a rectangle
  1098. Find the total Number of Digits in (N!)N
  1099. Check if the sum of digits of a number N divides it
  1100. Sum of all the prime numbers in a given range
  1101. Find the unit place digit of sum of N factorials
  1102. Sum of squares of Fibonacci numbers
  1103. Find normal at a given point on the curve
  1104. Program to find the side of the Octagon inscribed within the square
  1105. Find nth Term of the Series 1 2 2 4 4 4 4 8 8 8 8 8 8 8 8 ...
  1106. Number of distinct integers obtained by lcm(X, N)/X
  1107. Program to Calculate the Perimeter of a Decagon
  1108. Count of common multiples of two numbers in a range
  1109. Program to calculate area of inner circle which passes through center of outer circle and touches its circumference
  1110. Maximum count of equal numbers in an array after performing given operations
  1111. Check if the given vectors are at equilibrium or not
  1112. Find if a molecule can be formed from 3 atoms using their valence numbers
  1113. Largest number divisible by 90 that can be made using 0 and 5
  1114. Count number of ordered pairs with Even and Odd Product
  1115. Minimum and Maximum element of an array which is divisible by a given number k
  1116. Print a number containing K digits with digital root D
  1117. Minimum number of bottles required to fill K glasses
  1118. Find sum of N-th group of Natural Numbers
  1119. Sum of first N natural numbers which are divisible by 2 and 7
  1120. Section formula for 3 D
  1121. Triplet pair (a, b, c) such that a+b, b+c and a+c are all divisible by K
  1122. Print array elements in alternatively increasing and decreasing order
  1123. Check whether bitwise OR of N numbers is Even or Odd
  1124. Check if a number is an Achilles number or not
  1125. Minimum boxes required to carry all gifts
  1126. Program to find count of numbers having odd number of divisors in given range
  1127. Check if a string contains a palindromic sub-string of even length
  1128. Find number of Positional Elements
  1129. Round to next smaller multiple of 8
  1130. Number of leading zeros in binary representation of a given number
  1131. Replace every element of the array by product of all other elements
  1132. Number of segments where all elements are greater than X
  1133. Replace every array element by sum of previous and next
  1134. Rearrange an array to maximize i*arr[i]
  1135. Calculate volume and surface area of Torus
  1136. String matching with * (that matches with any) in any of the two strings
  1137. Assign other value to a variable from two possible values
  1138. Minimize Cost with Replacement with other allowed
  1139. Longest subarray with elements divisible by k
  1140. Primality test for the sum of digits at odd places of a number
  1141. Get maximum items when other items of total cost of an item are free
  1142. Find middle point segment from given segment lengths
  1143. Count subarrays with all elements greater than K
  1144. Equation of ellipse from its focus, directrix, and eccentricity
  1145. Minimum number of operations required to reduce N to 1
  1146. Find the total marks obtained according to given marking scheme
  1147. Maximum area of rectangle possible with given perimeter
  1148. Area of decagon inscribed within the circle
  1149. Program to find the smallest element among three elements
  1150. N digit numbers divisible by 5 formed from the M digits
  1151. Find the sum of first N odd Fibonacci numbers
  1152. Number of cells in the right and left diagonals passing through (x, y) in a matrix
  1153. Count number less than N which are product of perfect squares
  1154. Smallest odd digits number not less than N
  1155. Minimum Cuts can be made in the Chessboard such that it is not divided into 2 parts
  1156. Largest number not greater than N all the digits of which are odd
  1157. Check if any permutation of a number is divisible by 3 and is Palindromic
  1158. Maximum sum and product of the M consecutive digits in a number
  1159. Partition an array such into maximum increasing segments
  1160. Minimum cuts required to divide the Circle into equal parts
  1161. Smallest subarray such that all elements are greater than K
  1162. Largest cube that can be inscribed within the sphere
  1163. Largest sphere that can be inscribed inside a cube
  1164. Program to find the profit or loss when CP of N items is equal to SP of M items
  1165. Change K elements so that (a1^2 + a2^2 + …+ aN^2 ) <= (a1 + a2 +…+ aN) becomes true
  1166. Find minimum operations needed to make an Array beautiful
  1167. Minimum number of cuts required to make circle segments equal sized
  1168. Game of stones
  1169. Find two numbers with sum and product both same as N
  1170. Number of matches required to find the winner
  1171. Maximum no. of apples that can be kept in a single basket
  1172. Fibonacci problem (Value of Fib(N)*Fib(N) - Fib(N-1) * Fib(N+1))
  1173. Find the player who rearranges the characters to get a palindrome string first
  1174. Count pairs of numbers from 1 to N with Product divisible by their Sum
  1175. Check if a number is formed by Concatenation of 1, 14 or 144 only
  1176. Program to find the sum of the series (1/a + 2/a^2 + 3/a^3 + ... + n/a^n)
  1177. Print a case where the given sorting algorithm fails
  1178. Probability of getting more value in third dice throw
  1179. Number of ways to swap two bit of s1 so that bitwise OR of s1 and s2 changes
  1180. Maximum number of parallelograms that can be made using the given length of line segments
  1181. Sum of all natural numbers in range L to R
  1182. Minimum steps to convert one binary string to other only using negation
  1183. Minimize the number of steps required to reach the end of the array
  1184. Program to print 'N' alphabet using the number pattern from 1 to n
  1185. Largest cube that can be inscribed within a right circular cylinder
  1186. Count pairs with Bitwise XOR as EVEN number
  1187. Number of pairs with Bitwise OR as Odd number
  1188. Count pairs with Bitwise-AND as even number
  1189. Count Numbers with N digits which consists of even number of 0’s
  1190. Find determinant of matrix generated by array rotation
  1191. Largest right circular cylinder that can be inscribed within a cone
  1192. Nth number made up of odd digits only
  1193. Find minimum steps required to reach the end of a matrix | Set - 1
  1194. Find position of left most dis-similar bit for two numbers
  1195. Distance between two nodes of binary tree with node values from 1 to N
  1196. Range and Coefficient of range of Array
  1197. Minimum elements to change so that for an index i all elements on the left are -ve and all elements on the right are +ve
  1198. Program to find first N Iccanobif Numbers
  1199. Find the Nth term of the series 14, 28, 20, 40,.....
  1200. Minimum range increment operations to Sort an array
  1201. Find the sum of Eigen Values of the given N*N matrix
  1202. Largest number less than N with digit sum greater than the digit sum of N
  1203. Check If every group of a's is followed by a group of b's of same length
  1204. Sum of first N natural numbers which are divisible by X or Y
  1205. Smallest Pair Sum in an array
  1206. Construct a binary string following the given constraints
  1207. Larger of a^b or b^a (a raised to power b or b raised to power a)
  1208. Find the only different element in an array
  1209. Reduce the array to a single element with the given operation
  1210. Number of Binary Strings of length N with K adjacent Set Bits
  1211. Sum of the multiples of two numbers below N
  1212. Split a number into 3 parts such that none of the parts is divisible by 3
  1213. Closest perfect square and its distance
  1214. Count sub-sets that satisfy the given condition
  1215. Integers from the range that are composed of a single distinct digit
  1216. Find nth Hermite number
  1217. Lower Insertion Point
  1218. Longest Subsequence where index of next element is arr[arr[i] + i]
  1219. Minimum number of consecutive sequences that can be formed in an array
  1220. Sum of elements from an array having even parity
  1221. Side of a regular n-sided polygon circumscribed in a circle
  1222. Check if the sum of distinct digits of two integers are equal
  1223. Largest Square that can be inscribed within a hexagon
  1224. Program to check the number is Palindrome or not
  1225. Find the maximum possible value of the minimum value of modified array
  1226. Diagonal of a Regular Hexagon
  1227. Number of array elements derivable from D after performing certain operations
  1228. Pairs from an array that satisfy the given condition
  1229. Largest hexagon that can be inscribed within a square
  1230. Count common prime factors of two numbers
  1231. Diagonal of a Regular Decagon
  1232. Generate all rotations of a number
  1233. Minimum absolute difference between N and a power of 2
  1234. Maximum value of arr[i] % arr[j] for a given array
  1235. Program to find nth term of the series 1 4 15 24 45 60 92
  1236. Program to delete Nth digit of a Number
  1237. First and Last Three Bits
  1238. Smallest perfect square divisible by all elements of an array
  1239. Ways to paint N paintings such that adjacent paintings don't have same colors
  1240. Largest square that can be inscribed within a hexagon which is inscribed within an equilateral triangle
  1241. Check whether two straight lines are orthogonal or not
  1242. Program for Area Of Square after N-th fold
  1243. Make all elements of an array equal with the given operation
  1244. Count of pairs of (i, j) such that ((n % i) % j) % n is maximized
  1245. Largest sphere that can be inscribed in a right circular cylinder inscribed in a frustum
  1246. Minimum positive integer divisible by C and is not in range [A, B]
  1247. Filling diagonal to make the sum of every row, column and diagonal equal of 3x3 matrix
  1248. Closest sum partition (into two subsets) of numbers from 1 to n
  1249. Minimum operations required to make all the array elements equal
  1250. Check whether Bishop can take down Pawn or not
  1251. Count the total number of squares that can be visited by Bishop in one move
  1252. Minimum spanning tree cost of given Graphs
  1253. Maximum sum after repeatedly dividing N by a divisor
  1254. Find the values of X and Y in the Given Equations
  1255. Choose points from two ranges such that no point lies in both the ranges
  1256. Find maximum operations to reduce N to 1
  1257. Find frequency of smallest value in an array
  1258. Find Intersection of all Intervals
  1259. Maximize big when both big and small can be exchanged
  1260. Minimum number of operations on an array to make all elements 0
  1261. Count the number of rhombi possible inside a rectangle of given size
  1262. Program to calculate the area between two Concentric Circles
  1263. Count of quadruplets from range [L, R] having GCD equal to K
  1264. Total number of days taken to complete the task if after certain days one person leaves
  1265. Composite numbers with digit sum 1
  1266. Length of the longest alternating subarray
  1267. Numbers less than N that are perfect cubes and the sum of their digits reduced to a single digit is 1
  1268. Minimize the sum of squares of sum of N/2 paired formed by N numbers
  1269. Maximum positive integer divisible by C and is in the range [A, B]
  1270. Position of a person diametrically opposite on a circle
  1271. Longest Sub-array with maximum average value
  1272. Ways to Remove Edges from a Complete Graph to make Odd Edges
  1273. Check if product of digits of a number at even and odd places is equal
  1274. Minimum matches the team needs to win to qualify
  1275. Find smallest number K such that K % p = 0 and q % K = 0
  1276. Sum of all odd factors of numbers in the range [l, r]
  1277. Count permutations that are first decreasing then increasing.
  1278. Count numbers having N 0's and and M 1's with no leading zeros
  1279. Print the balanced bracket expression using given brackets
  1280. Count of numbers having only 1 set bit in the range [0, n]
  1281. Encrypt a string by repeating i-th character i times
  1282. Minimum cost to form a number X by adding up powers of 2
  1283. Kth odd number in an array
  1284. Check if the given array is mirror-inverse
  1285. Count pairs in array whose sum is divisible by K
  1286. Count how many times the given digital clock shows identical digits
  1287. Find maximum N such that the sum of square of first N natural numbers is not more than X
  1288. Generate array with minimum sum which can be deleted in P steps
  1289. Count rotations of N which are Odd and Even
  1290. Count of pairs from 1 to a and 1 to b whose sum is divisible by N
  1291. Check if Matrix remains unchanged after row reversals
  1292. Smallest and Largest N-digit perfect squares
  1293. Minimum length of square to contain at least half of the given Coordinates
  1294. Largest number N which can be reduced to 0 in K steps
  1295. Find the number of ways to divide number into four parts such that a = c and b = d
  1296. Smallest index in the given array that satisfies the given condition
  1297. Programs for printing pyramid patterns using recursion
  1298. Predict the winner in Coin Game
  1299. Number of ways to go from one point to another in a grid
  1300. Replace array elements by sum of next two consecutive elements
  1301. Maximum array sum that can be obtained after exactly k changes
  1302. Count the number of non-increasing subarrays
  1303. Number of ways for playing first move optimally in a NIM game
  1304. Find the value of N when F(N) = f(a)+f(b) where a+b is the minimum possible and a*b = N
  1305. Remove elements to make array sorted
  1306. Count of quadruplets with given Sum
  1307. Maximize the maximum subarray sum after removing atmost one element
  1308. Product of all Subsequences of size K except the minimum and maximum Elements
  1309. Print all numbers whose set of prime factors is a subset of the set of the prime factors of X
  1310. Check if a number from every row can be selected such that xor of the numbers is greater than zero
  1311. Area of triangle formed by the axes of co-ordinates and a given straight line
  1312. Find maximum product of digits among numbers less than or equal to N
  1313. Find the minimum sum of distance to A and B from any integer point in a ring of size N
  1314. Find the position of box which occupies the given ball
  1315. Check if string can be made lexicographically smaller by reversing any substring
  1316. Number of character corrections in the given strings to make them equal
  1317. Maximum length of subarray such that sum of the subarray is even
  1318. Given two arrays count all pairs whose sum is an odd number
  1319. Print steps to make a number in form of 2^X - 1
  1320. Length of the direct common tangent between two externally touching circles
  1321. Radius of the circle when the width and height of an arc is given
  1322. Length of direct common tangent between the two non-intersecting Circles
  1323. Maximize the given number by replacing a segment of digits with the alternate digits given
  1324. Minimum number of cubes whose sum equals to given number N
  1325. Convert given integer X to the form 2^N - 1
  1326. Count number of 1s in the array after N moves
  1327. Check if given Preorder, Inorder and Postorder traversals are of same tree | Set 2
  1328. Area of plot remaining at the end
  1329. Find permutation of first N natural numbers that satisfies the given condition
  1330. Compare sum of first N-1 elements to Nth element of an array
  1331. Choose X such that (A xor X) + (B xor X) is minimized
  1332. Program to print an array in Pendulum Arrangement with constant space
  1333. Maximum number of edges in Bipartite graph
  1334. Minimum integer such that it leaves a remainder 1 on dividing with any element from the range [2, N]
  1335. Generate an Array in which count of even and odd sum sub-arrays are E and O respectively
  1336. Program to find the rate percentage from compound interest of consecutive years
  1337. Count Pairs from two arrays with even sum
  1338. Rearrange the array to maximize the number of primes in prefix sum of the array
  1339. Ratio of the distance between the centers of the circles and the point of intersection of two transverse common tangents to the circles
  1340. Create a sequence whose XOR of elements is y
  1341. Minimum sum of two numbers formed from digits of an array in O(n)
  1342. Count of distinct rectangles inscribed in an equilateral triangle
  1343. Bitwise AND of sub-array closest to K
  1344. Check if the number is even or odd whose digits and base (radix) is given
  1345. Check whether a number can be represented as sum of K distinct positive integers
  1346. Find minimum steps required to reach the end of a matrix | Set 2
  1347. Count index pairs which satisfy the given condition
  1348. Number of common tangents between two circles if their centers and radius is given
  1349. Number of trees whose sum of degrees of all the vertices is L
  1350. Check if a circle lies inside another circle or not
  1351. Angle subtended by the chord when the angle subtended by another chord of same length is given
  1352. Queries for bitwise OR in the index range [L, R] of the given array
  1353. Queries for bitwise AND in the index range [L, R] of the given array
  1354. Find average of two numbers using bit operation
  1355. Find if nCr is divisible by the given prime
  1356. Maximum possible middle element of the array after deleting exactly k elements
  1357. Distance of chord from center when distance between center and another equal length chord is given
  1358. Subset with sum closest to zero
  1359. Check whether we can sort two arrays by swapping A[i] and B[i]
  1360. Angle subtended by the chord to center of the circle when the angle subtended by the another equal chord of a congruent circle is given
  1361. Distance between centers of two intersecting circles if the radii and common chord length is given
  1362. Length of the chord the circle if length of the another chord which is equally inclined through the diameter is given
  1363. Print the node with the maximum degree in the prufer sequence
  1364. Queries for the difference between the count of composite and prime numbers in a given range
  1365. Maximise matrix sum by following the given Path
  1366. Check whether a subsequence exists with sum equal to k if arr[i]> 2*arr[i-1]
  1367. Find the number of Chicks in a Zoo at Nth day
  1368. Find maximum path sum in a 2D matrix when exactly two left moves are allowed
  1369. Minimum count of elements that sums to a given number
  1370. Maximum sum of non-overlapping subarrays of length atmost K
  1371. Queries to check whether all the elements can be made positive by flipping signs exactly K times
  1372. Check if two numbers have same number of digits
  1373. Maximum distance between two unequal elements
  1374. Minimum length subarray of 1s in a Binary Array
  1375. Find row with maximum and minimum number of zeroes in given Matrix
  1376. Number of 0s and 1s at prime positions in the given array
  1377. Maximum water that can be stored between two buildings
  1378. Sum of all perfect numbers present in an array
  1379. Maximum subset sum such that no two elements in set have same digit in them
  1380. Program to calculate angle on circumference subtended by the chord when the central angle subtended by the chord is given
  1381. Length of longest sub-array with maximum arithmetic mean.
  1382. Sum of all mersenne numbers present in an array
  1383. Longest sub-sequence that satisfies the given conditions
  1384. Maximum sub-sequence sum such that indices of any two adjacent elements differs at least by 3
  1385. Print all the sub diagonal elements of the given square matrix
  1386. Number of ways to get a given sum with n number of m-faced dices
  1387. Total number of possible Binary Search Trees using Catalan Number
  1388. Partition first N natural number into two sets such that their sum is not coprime
  1389. Find the maximum number of elements divisible by 3
  1390. Find maximum value of the last element after reducing the array with given operations
  1391. Seating arrangement of N boys sitting around a round table such that two particular boys sit together
  1392. Find optimal weights which can be used to weigh all the weights in the range [1, X]
  1393. Number of ways of writing N as a sum of 4 squares
  1394. Print first N terms of Lower Wythoff sequence
  1395. Count of numbers whose 0th and Nth bits are set
  1396. Find a number containing N - 1 set bits at even positions from the right
  1397. Number of triplets such that each value is less than N and each pair sum is a multiple of K
  1398. Probability of getting more heads than tails when N biased coins are tossed
  1399. Minimum steps required to convert the matrix into lower hessenberg matrix
  1400. Program to calculate the area of Kite
  1401. Find the number which when added to the given ratio a : b, the ratio changes to c : d
  1402. Smallest perfect cube in an array
  1403. Number of ways of distributing N identical objects in R distinct groups with no groups empty
  1404. Total ways of choosing X men and Y women from a total of M men and W women
  1405. Find the position of the given row in a 2-D array
  1406. Minimum number of steps to convert a given matrix into Diagonally Dominant Matrix
  1407. Remove an element to maximize the GCD of the given array
  1408. Number of hours after which the second person moves ahead of the first person if they travel at a given speed
  1409. Sequence with sum K and minimum sum of absolute differences between consecutive elements
  1410. Cost Based Tower of Hanoi
  1411. Remove Minimum coins such that absolute difference between any two piles is less than K
  1412. Find the count of M character words which have at least one character repeated
  1413. Count pairs with given sum | Set 2
  1414. Count pairs in an array such that the absolute difference between them is ≥ K
  1415. Maximum value after merging all elements in the array
  1416. Find area of the larger circle when radius of the smaller circle and difference in the area is given