mohit kumar 29
mohit kumar 29
  1. Find all the numbers in a string using regular expression in Python
  2. Check if the sum of perfect squares in an array is divisible by x
  3. Find the nth term of the series 0, 8, 64, 216, 512, . . .
  4. Sum of elements whose square root is present in the array
  5. Leftmost and rightmost indices of the maximum and the minimum element of an array
  6. Sum of elements from an array having even parity
  7. Count numbers have all 1s together in binary representation
  8. The most occurring number in a string using Regex in python
  9. All pairs whose xor gives unique prime
  10. Count of numbers which can be made power of 2 by given operation
  11. Find elements of array using XOR of consecutive elements
  12. Find the Nth term of the series 9, 45, 243,1377
  13. Pairs from an array that satisfy the given condition
  14. Find the sum of first N terms of the series 2*3*5, 3*5*7, 4*7*9, ...
  15. Jump in rank of a student after updating marks
  16. Program to find the nth term of the series -2, 4, -6, 8....
  17. Program to find the Nth term of the series 0, 3/1, 8/3, 15/5........
  18. Find the sum of non-prime elements in the given array
  19. Print all safe primes below N
  20. Count pairs in an array such that at least one element is prime
  21. Check whether the sum of absolute difference of adjacent digits is Prime or not
  22. Print prime numbers with prime sum of digits in an array
  23. Print all multiplicative primes <= N
  24. Find the node whose xor with x gives minimum value
  25. Find the node whose xor with x gives maximum value
  26. Find the node whose sum with X has maximum set bits
  27. Find the node whose absolute difference with X gives maximum value
  28. Find the node whose sum with X has minimum set bits
  29. Find the node whose absolute difference with X gives minimum value
  30. Count the nodes whose weight is a perfect square
  31. Count the nodes in the given tree whose weight is prime
  32. Count the nodes in the given tree whose weight is even
  33. Find the root of the sub-tree whose weighted sum is minimum
  34. Find the root of the sub-tree whose weighted sum XOR with X is minimum
  35. Find the root of the sub-tree whose weighted sum XOR with X is maximum
  36. Count the nodes in the given tree whose weight is a power of two
  37. Count the nodes in the given tree whose weight is even parity
  38. Count the nodes in the given tree whose sum of digits of weight is odd
  39. Count the nodes of the given tree whose weighted string is a palindrome
  40. Count the nodes of the given tree whose weight has X as a factor
  41. Count the nodes of a tree whose weighted string does not contain any duplicate characters
  42. Count the nodes of a tree whose weighted string is an anagram of the given string
  43. Count the nodes of the tree which make a pangram when concatenated with the sub-tree nodes
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  1. How to swap two numbers without using a temporary variable?
  2. Efficient way to multiply with 7
  3. Find the Number Occurring Odd Number of Times
  4. Find whether a given number is a power of 4 or not
  5. A Product Array Puzzle
  6. Check if array elements are consecutive | Added Method 3
  7. Partition problem | DP-18
  8. Find the element that appears once
  9. Generate n-bit Gray Codes
  10. Minimum insertions to form a palindrome | DP-28
  11. Print all possible strings of length k that can be formed from a set of n characters
  12. Print all possible paths from top left to bottom right of a mXn matrix
  13. Count all possible paths from top left to bottom right of a mXn matrix
  14. Find the first repeating element in an array of integers
  15. Given a matrix of 'O' and 'X', find the largest subsquare surrounded by 'X'
  16. Find the element that appears once in an array where every other element appears twice
  17. Find the nearest smaller numbers on left side in an array
  18. Sum of minimum and maximum elements of all subarrays of size k.
  19. Count numbers from 1 to n that have 4 as a digit
  20. Count distinct elements in every window of size k
  21. Minimum Initial Points to Reach Destination
  22. Count of n digit numbers whose sum of digits equals to given sum
  23. Given an array of pairs, find all symmetric pairs in it
  24. Print a pattern without using any loop
  25. Count Fibonacci numbers in given range in O(Log n) time and O(1) space
  26. Common elements in all rows of a given matrix
  27. Repeated subsequence of length 2 or more
  28. Find smallest range containing elements from k lists
  29. Find the minimum difference between Shifted tables of two numbers
  30. Longest Common Increasing Subsequence (LCS + LIS)
  31. Remove duplicates from an array of small primes
  32. Rearrange positive and negative numbers with constant extra space
  33. Calculate sum of all numbers present in a string
  34. Count Distinct Subsequences
  35. Frequency Measuring Techniques for Competitive Programming
  36. Count all sorted rows in a matrix
  37. Count all pairs with given XOR
  38. Print matrix in diagonal pattern
  39. Minimum sum of two numbers formed from digits of an array
  40. Find all distinct subset (or subsequence) sums of an array
  41. Find sum of divisors of all the divisors of a natural number
  42. Print all possible sums of consecutive numbers with sum N
  43. Find pair with greatest product in array
  44. Find pairs in array whose sums already exist in array
  45. Find elements which are present in first array and not in second
  46. k-th prime factor of a given number
  47. Queries on substring palindrome formation
  48. Count of index pairs with equal elements in an array
  49. Maximum number of groups of size 3 containing two type of items
  50. Minimum time required to produce m items
  51. Check if reversing a sub array make the array sorted
  52. Efficiently check if a string has all unique characters without using any additional data structure
  53. Largest subsequence having GCD greater than 1
  54. Prime Factorization using Sieve O(log n) for multiple queries
  55. Maximum and Minimum in a square matrix.
  56. Count all pairs of an array which differ in K bits
  57. Ways to represent a number as a sum of 1's and 2's
  58. Find all pairs (a,b) and (c,d) in array which satisfy ab = cd
  59. Check if frequency of each digit is less than the digit
  60. Count pairs with sum as a prime number and less than n
  61. Noble integers in an array (count of greater elements is equal to value)
  62. Find if n can be written as product of k numbers
  63. Count the number of subarrays having a given XOR
  64. Minimum cost for acquiring all coins with k extra coins allowed with every coin
  65. Check whether an array can be fit into another array rearranging the elements in the array
  66. Count the number of ways to divide an array into three contiguous parts having equal sum
  67. Print all distinct characters of a string in order (3 Methods)
  68. Print a given matrix in reverse spiral form
  69. Program to print all substrings of a given string
  70. Count subarrays having total distinct elements same as original array
  71. Find all pairs (a, b) in an array such that a % b = k
  72. Extract maximum numeric value from a given string | Set 1 (General approach)
  73. Elements of an array that are not divisible by any element of another array
  74. Divide the two given numbers by their common divisors
  75. Minimum insertions to form a palindrome with permutations allowed
  76. Nth Even length Palindrome
  77. Program to calculate the number of odd days in given number of years
  78. Find the overlapping sum of two arrays
  79. Program to print solid and hollow square patterns
  80. Convert all substrings of length 'k' from base 'b' to decimal
  81. Check if the given string of words can be formed from words present in the dictionary
  82. Next greater element in same order as input
  83. Remove minimum number of elements such that no common element exist in both array
  84. Evaluate a boolean expression represented as string
  85. Count subarrays with equal number of occurrences of two given elements
  86. Count number of paths whose weight is exactly X and has at-least one edge of weight M
  87. Count number of distinct pairs whose sum exists in the given array
  88. C++ Program for Longest Increasing Subsequence
  89. Check if two unsorted arrays (with duplicates allowed) have same elements
  90. Positive elements at even and negative at odd positions (Relative order not maintained)
  91. Program to find if a character is vowel or Consonant
  92. Array range queries over range queries
  93. Smallest number k such that the product of digits of k is equal to n
  94. Generate two output strings depending upon occurrence of character in input string.
  95. Program for diamond pattern with different layers
  96. Mean of range in array
  97. Distance of closest zero to every element
  98. Combinations from n arrays picking one element from each array
  99. Tile Stacking Problem
  100. Cumulative frequency of count of each element in an unsorted array
  101. Print digit's position to be removed to make a number divisible by 6
  102. Maximum number of characters between any two same character in a string
  103. Print symmetric double triangle pattern
  104. Elements to be added so that all elements of a range are present in array
  105. Divisors of n-square that are not divisors of n
  106. Maximum Unique Element in every subarray of size K
  107. Check whether a number can be represented by sum of two squares
  108. Find if there is a rectangle in binary matrix with corners as 1
  109. Pair with given sum and maximum shortest distance from end
  110. Generate original array from an array that store the counts of greater elements on right
  111. Find minimum shift for longest common prefix
  112. Minimum jumps to reach last building in a matrix
  113. Program to find the minimum (or maximum) element of an array
  114. Find largest element from array without using conditional operator
  115. Program to print number with star pattern
  116. Program to find third side of triangle using law of cosines
  117. Check whether second string can be formed from characters of first string
  118. Partition into two subarrays of lengths k and (N - k) such that the difference of sums is maximum
  119. Largest subset with sum of every pair as prime
  120. Minimum number of points to be removed to get remaining points on one side of axis
  121. Count number of increasing subsequences of size k
  122. Count subarrays with equal number of 1's and 0's
  123. Check if the given string is the same as its reflection in a mirror
  124. Program to print V and inverted-V pattern
  125. Find the position of the last removed element from the array
  126. Count maximum-length palindromes in a String
  127. Construct sum-array with sum of elements in given range
  128. Program to copy the contents of one array into another in the reverse order
  129. Count of numbers appearing in the given ranges at-least K times
  130. Maximum sum of increasing order elements from n arrays
  131. Most frequent element in an array
  132. Least frequent element in an array
  133. Find the only repetitive element between 1 to n-1
  134. Largest even digit number not greater than N
  135. Sum of special triplets having elements from 3 arrays
  136. Array range queries for elements with frequency same as value
  137. Count substrings with each character occurring at most k times
  138. Maximum possible difference of two subsets of an array
  139. Count pairs in an array which have at least one digit common
  140. Find the Largest Cube formed by Deleting minimum Digits from a number
  141. Print array elements that are divisible by at-least one other
  142. Program to print the hollow numerical parallelogram
  143. Count binary strings with twice zeros in first half
  144. Max sum of M non-overlapping subarrays of size K
  145. Find Sum of all unique sub-array sum for a given array.
  146. Prefixes with more a than b
  147. Find the only element that appears b times
  148. Print all triplets with given sum
  149. Count elements present in first array but not in second
  150. Minimum steps to reach end from start by performing multiplication and mod operations with array elements
  151. Maximum number by concatenating every element in a rotation of an array
  152. Minimum operations required to make all the elements distinct in an array
  153. Previous greater element
  154. Count of elements of an array present in every row of NxM matrix
  155. Number of Counterclockwise shifts to make a string palindrome
  156. First non-repeating character using one traversal of string | Set 2
  157. Egg Dropping Puzzle with 2 Eggs and K Floors
  158. Elements of first array that have more frequencies
  159. Sum of similarities of string with all of its suffixes
  160. Maximum bishops that can be placed on N*N chessboard
  161. All elements in an array are Same or not?
  162. Program to print Sine-Wave Pattern
  163. Sum of all elements repeating 'k' times in an array
  164. Check if a number is in given base or not
  165. Find next palindrome prime
  166. Counting frequencies of array elements
  167. Maximum profit after buying and selling the stocks
  168. Find the Missing Number in a sorted array
  169. Elements that occurred only once in the array
  170. Check if the first and last digit of the smallest number forms a prime
  171. Length of longest common subsequence containing vowels
  172. Minimum number of items to be delivered
  173. Longest subarray having maximum sum
  174. Find the largest after deleting the given elements
  175. Solve the Logical Expression given by string
  176. Find the Initial Array from given array after range sum queries
  177. Longest dividing subsequence
  178. Find minimum number of Log value needed to calculate Log upto N
  179. Longest Subarray with Sum greater than Equal to Zero
  180. Longest subarray having difference in the count of 1's and 0's equal to k
  181. Minimum number greater than the maximum of array which cannot be formed using the numbers in the array
  182. Minimum changes required to make two arrays identical
  183. Count common subsequence in two strings
  184. Minimum and Maximum prime numbers in an array
  185. Program to print Kite Pattern
  186. Minimum odd cost path in a matrix
  187. Maximize the value of A by replacing some of its digits with digits of B
  188. Find triplets in an array whose AND is maximum
  189. Find column with maximum sum in a Matrix
  190. Program to print the Zigzag pattern
  191. Find the k-th smallest divisor of a natural number N
  192. Pair with maximum difference in a Matrix
  193. Check if a pair with given absolute difference exists in a Matrix
  194. Find the sum of all highest occurring elements in an Array
  195. Sum of all minimum occurring elements in an Array
  196. Program to print Hut Star pattern
  197. Product of non-repeating (distinct) elements in an Array
  198. Sum of all prime numbers in an Array
  199. Product of all prime numbers in an Array
  200. Program to Print Mirrored Hollow Parallelogram
  201. Maximum number of Unique integers in Sub-Array of given size
  202. Find the smallest after deleting given elements
  203. Remove duplicates from unsorted array
  204. Find the k largest numbers after deleting the given elements
  205. Find the k smallest numbers after deleting given elements
  206. Check if a number is a Mystery Number
  207. Find the Product of first N Prime Numbers
  208. Find subsequences with maximum Bitwise AND and Bitwise OR
  209. Count and Sum of composite elements in an array
  210. Find maximum distance between any city and station
  211. Program to find Prime Numbers Between given Interval
  212. Product of all the Composite Numbers in an array
  213. Convert given array to Arithmetic Progression by adding an element
  214. Replace each element by the difference of the total size of the array and frequency of that element
  215. Sum of array Elements without using loops and recursion
  216. Magical Pattern
  217. Count pairs in an array such that both elements has equal set bits
  218. Largest number not greater than N all the digits of which are odd
  219. Find a number that divides maximum array elements
  220. Check if the array has an element which is equal to sum of all the remaining elements
  221. Check whether the frequencies of all the characters in a string are prime or not
  222. Find all numbers that divide maximum array elements
  223. Count Triplets such that one of the numbers can be written as sum of the other two
  224. Minimize the number of steps required to reach the end of the array
  225. Find maximum element of each column in a matrix
  226. Maximum length substring with highest frequency in a string
  227. Sum of elements in an array having prime frequency
  228. Find smallest and largest element from square matrix diagonals
  229. Find the largest interval that contains exactly one of the given N integers.
  230. Find alphabet in a Matrix which has maximum number of stars around it
  231. Find a sub matrix with maximum XOR
  232. Minimum Distance Between Words of a String
  233. Count the number of special permutations
  234. LCM of N numbers modulo M
  235. Minimum in an array which is first decreasing then increasing
  236. Minimum steps to reach any of the boundary edges of a matrix | Set 1
  237. Form N-copy string with add, remove and append operations
  238. Find minimum x such that (x % k) * (x / k) == n
  239. Sum of kth powers of first n natural numbers
  240. Find elements of array using XOR of consecutive elements
  241. Find the maximum possible value of the minimum value of modified array
  242. Area of Reuleaux Triangle
  243. Biggest Reuleaux Triangle within A Square
  244. Count pairs in an array that hold i+j= arr[i]+arr[j]
  245. Reach the numbers by making jumps of two given lengths
  246. Largest hexagon that can be inscribed within an equilateral triangle
  247. A Sum Array Puzzle
  248. Diagonal of a Regular Heptagon
  249. Diagonal of a Regular Decagon
  250. Length of Diagonal of a n-sided regular polygon
  251. Generate all rotations of a number
  252. Count number of pairs (i, j) such that arr[i] * arr[j] > arr[i] + arr[j]
  253. How to delete an element from the Set by passing its value in C++
  254. Generate permutation of 1 to N such that absolute difference of consecutive numbers give K distinct integers
  255. Count rows in a matrix that consist of same element
  256. Number of subarrays have bitwise OR >= K
  257. Smallest multiple of 3 which consists of three given non-zero digits
  258. Minimum number of sets with numbers less than Y
  259. Minimum number N such that total set bits of all numbers from 1 to N is at-least X
  260. Count pairs of parentheses sequences such that parentheses are balanced
  261. Minimum steps required to convert X to Y where a binary matrix represents the possible conversions
  262. Distribute N candies among K people
  263. Program to find nth term of the series 1 4 15 24 45 60 92
  264. Possible cuts of a number such that maximum parts are divisible by 3
  265. First and Last Three Bits
  266. K length words that can be formed from given characters without repetition
  267. Program to print Step Pattern
  268. Length of the longest substring with consecutive characters
  269. Largest sub-set possible for an array satisfying the given condition
  270. Ways to paint N paintings such that adjacent paintings don't have same colors
  271. Maximum length subarray with LCM equal to product
  272. Find probability of selecting element from kth column after N iterations
  273. Find the sum of the all amicable numbers up to N
  274. Sum of P terms of an AP if Mth and Nth terms are given
  275. Ternary Search
  276. Biggest Reuleaux Triangle within a Square which is inscribed within a Circle
  277. Biggest Reuleaux Triangle within a Square which is inscribed within a Right angle Triangle
  278. Largest right circular cylinder that can be inscribed within a cone which is in turn inscribed within a cube
  279. Print all Proth primes up to N
  280. Find Pth term of a GP if Mth and Nth terms are given
  281. Count distinct elements in an array
  282. Count of strings that become equal to one of the two strings after one removal
  283. Rearrange Odd and Even values in Alternate Fashion in Ascending Order
  284. Count number of sub-sequences with GCD 1
  285. Largest number less than or equal to N/2 which is coprime to N
  286. Reverse Middle X Characters
  287. Find the area of largest circle inscribed in ellipse
  288. Print multiples of Unit Digit of Given Number
  289. Rectangle with minimum possible difference between the length and the width
  290. Count strings that end with the given pattern
  291. Biggest Reuleaux Triangle inscribed within a Square inscribed in an equilateral triangle
  292. Biggest Reuleaux Triangle inscirbed within a square inscribed in a semicircle
  293. Count of values of x <= n for which (n XOR x) = (n - x)
  294. Generate lexicographically smallest string of 0, 1 and 2 with adjacent swaps allowed
  295. Find the final X and Y when they are Altering under given condition
  296. Count the number of survivors
  297. Remove characters from a numeric string such that string becomes divisible by 8
  298. Remove any corner X rows and columns from a matrix
  299. Count of pairs of (i, j) such that ((n % i) % j) % n is maximized
  300. Largest sphere that can be inscribed in a right circular cylinder inscribed in a frustum
  301. Minimum positive integer divisible by C and is not in range [A, B]
  302. Count all Prime Length Palindromic Substrings
  303. Find minimum difference between any two elements | Set 2
  304. Find Intersection of all Intervals
  305. Maximum length subsequence such that adjacent elements in the subsequence have a common factor
  306. Number of strings that satisfy the given condition
  307. Check if a string can be converted to another string by replacing vowels and consonants
  308. Sum of XOR of all subarrays
  309. Sum of bitwise AND of all subarrays
  310. Minimum index i such that all the elements from index i to given index are equal
  311. Find the longest Fibonacci-like subarray of the given array
  312. Split an array into groups of 3 such that X3 is divisible by X2 and X2 is divisible by X1
  313. Queries for number of distinct integers in Suffix
  314. Maximum positive integer divisible by C and is in the range [A, B]
  315. Ways to form an array having integers in given range such that total sum is divisible by 2
  316. Select numbers in such way to maximize the amount of money
  317. Check whether the number can be made perfect square after adding 1
  318. Number of Hamiltonian cycle
  319. Split the array into odd number of segments of odd lengths
  320. Check if an array of 1s and 2s can be divided into 2 parts with equal sum
  321. Minimum number of stacks possible using boxes of given capacities
  322. Count array elements that divide the sum of all other elements
  323. Number of trailing zeroes in base 16 representation of N!
  324. Count paths with distance equal to Manhattan distance
  325. Find the number of solutions to the given equation
  326. Find whether only two parallel lines contain all coordinates points or not
  327. XOR of a submatrix queries
  328. Find the minimum number of preprocess moves required to make two strings equal
  329. Find the Nth term of the series where each term f[i] = f[i - 1] - f[i - 2]
  330. Sum of minimum element of all sub-sequences of a sorted array
  331. k-th missing element in an unsorted array
  332. Maximum occurrence of prefix in the Array
  333. Longest subsequence such that adjacent elements have at least one common digit
  334. Count all elements in the array which appears at least K times after their first occurrence
  335. Two equal sum segment range queries
  336. Numbers in a Range with given Digital Root
  337. Sum of numbers from 1 to N which are in Lucas Sequence
  338. Check for an array element that is co-prime with all others
  339. Find GCD of factorial of elements of given array
  340. Minimum steps to make all the elements of the array divisible by 4
  341. Sum of elements in an array whose difference with the mean of another array is less than k
  342. Count of numbers from range [L, R] whose sum of digits is Y
  343. Find the sum of all Truncatable primes below N
  344. Search an element in given N ranges
  345. Check if the given array can be reduced to zeros with the given operation performed given number of times
  346. Find the numbers of strings that can be formed after processing Q queries
  347. Minimum array elements to be changed to make Recaman's sequence
  348. Maximum array sum that can be obtained after exactly k changes
  349. Replace the odd positioned elements with their cubes and even positioned elements with their squares
  350. Pairs of strings which on concatenating contains each character of "string"
  351. Generate original array from difference between every two consecutive elements
  352. Count number of ways to reach a given score in a Matrix
  353. Count of sub-strings that do not contain all the characters from the set {'a', 'b', 'c'} at the same time
  354. Find the area of the shaded region formed by the intersection of four semicircles in a square
  355. Maximum points covered after removing an Interval
  356. Minimum steps to color the tree with given colors
  357. Check whether factorial of N is divisible by sum of first N natural numbers
  358. Count of distinct sums that can be obtained by adding prime numbers from given arrays
  359. Maximum element in a sorted and rotated array
  360. Find the minimum number of steps to reach M from N
  361. Count the number of operations required to reduce the given number
  362. Sum of the series Kn + ( K(n-1) * (K-1)1 ) + ( K(n-2) * (K-1)2 ) + ....... (K-1)n
  363. Find the value of N when F(N) = f(a)+f(b) where a+b is the minimum possible and a*b = N
  364. Area of the biggest ellipse inscribed within a rectangle
  365. Count distinct points visited on the number line
  366. Count consecutive pairs of same elements
  367. Length of the longest increasing subsequence such that no two adjacent elements are coprime
  368. Find n positive integers that satisfy the given equations
  369. Find the Kth node in the DFS traversal of a given subtree in a Tree
  370. Find (1^n + 2^n + 3^n + 4^n) mod 5 | Set 2
  371. Find the longest sub-string which is prefix, suffix and also present inside the string
  372. Find missing element in a sorted array of consecutive numbers
  373. Minimum number of changes such that elements are first Negative and then Positive
  374. Find the number of players who roll the dice when the dice output sequence is given
  375. Predict the winner of the game on the basis of absolute difference of sum by selecting numbers
  376. Program to calculate product of digits of a number
  377. Count the number of currency notes needed
  378. Minimize the sum calculated by repeatedly removing any two elements and inserting their sum to the Array
  379. Queries to answer the number of ones and zero to the left of given index
  380. Program to find the maximum difference between the index of any two different numbers
  381. Minimum possible final health of the last monster in a game
  382. Check if all the 1's in a binary string are equidistant or not
  383. Find the sum of digits of a number at even and odd places
  384. Find the value at kth position in the generated array
  385. Count the number of sub-arrays such that the average of elements present in the sub-array is greater than that not present in the sub-array
  386. Find the lexicographically smallest string which satisfies the given condition
  387. Find the number of sub arrays in the permutation of first N natural numbers such that their median is M
  388. Travelling Salesman Problem implementation using BackTracking
  389. Find HCF of two numbers without using recursion or Euclidean algorithm
  390. Queries to check if substring[L...R] is palindrome or not
  391. Count pairs of non-overlapping palindromic sub-strings of the given string
  392. Number of triangles possible with given lengths of sticks which are powers of 2
  393. Count of elements whose absolute difference with the sum of all the other elements is greater than k
  394. Find minimum positive integer x such that a(x^2) + b(x) + c >= k
  395. Print 2-D co-ordinate points in ascending order followed by their frequencies
  396. Number of subsequences with zero sum
  397. Count of sub-strings that do not consist of the given character
  398. Count the pairs of vowels in the given string
  399. Find the kth element in the series generated by the given N ranges
  400. Check whether the given string is a valid identifier
  401. Count of sub-strings of length n possible from the given string
  402. Maximum absolute difference in an array
  403. Move all zeros to start and ones to end in an Array of random integers
  404. Find out the minimum number of coins required to pay total amount
  405. Maximum elements which can be crossed using given units of a and b
  406. Sum of the series 1, 2, 4, 3, 5, 7, 9, 6, 8, 10, 11, 13.. till N-th term
  407. Reverse alternate k characters in a string
  408. Check if a number from every row can be selected such that xor of the numbers is greater than zero
  409. Area of triangle formed by the axes of co-ordinates and a given straight line
  410. Check if given two straight lines are identical or not
  411. Minimum number of elements to be removed such that the sum of the remaining elements is equal to k
  412. Find maximum product of digits among numbers less than or equal to N
  413. Check if the frequency of any character is more than half the length of the string
  414. Maximum length palindrome that can be created with characters in range L and R
  415. Number of ways to arrange K different objects taking N objects at a time
  416. Game Theory in Balanced Ternary Numeral System | (Moving 3k steps at a time)
  417. Find the position of box which occupies the given ball
  418. Find the Diameter or Longest chord of a Circle
  419. Determine the position of the third person on regular N sided polygon
  420. Length of the chord of the circle whose radius and the angle subtended at the center by the chord is given
  421. Maximum length of subarray such that sum of the subarray is even
  422. Sliding Window Maximum (Maximum of all subarrays of size k) using stack in O(n) time
  423. Rearrange the array to maximize the number of primes in prefix sum of the array
  424. Bitwise AND of sub-array closest to K
  425. Optimal Strategy for a Game | Set 2
  426. Sum of GCDs of each row of the given matrix
  427. Queries to find the maximum Xor value between X and the nodes of a given level of a perfect binary tree
  428. Find the index which is the last to be reduced to zero after performing a given operation
  429. Number of common tangents between two circles if their centers and radius is given
  430. Check if a circle lies inside another circle or not
  431. Print all the sub diagonal elements of the given square matrix
  432. Construct the Rooted tree by using start and finish time of its DFS traversal
  433. Count of substrings which contains a given character K times
  434. Total number of odd length palindrome sub-sequence around each centre
  435. Print Lower Hessenberg matrix of order N
  436. Print Upper Hessenberg matrix of order N
  437. Count common elements in two arrays containing multiples of N and M
  438. Number of triangles formed by joining vertices of n-sided polygon with one side common