1. Minimum array element changes to make its elements 1 to N
  2. Maximum length of a sub-array with ugly numbers
  3. Sum of decimal equivalent of all possible pairs of Binary representation of a Number
  4. Number of substrings of one string present in other
  5. Total character pairs from two strings, with equal number of set bits in their ascii value
  6. Program to find Sum of the series 1*3 + 3*5 + ....
  7. Sum of first n term of Series 3, 5, 9, 17, 33....
  8. Perl | Scope of Variables
  9. Perl | References
  10. Sum of first N terms of Quadratic Sequence 3 + 7 + 13 + ...
  11. Rotations of a Binary String with Odd Value
  12. Minimize the length of string by removing occurrence of only one character
  13. Minimum no. of operations required to make all Array Elements Zero
  14. Ratio of mth and nth terms of an A. P. with given ratio of sums
  15. Sum of the first N terms of the series 5,12, 23, 38....
  16. Sum of the first N terms of the series 2,10, 30, 68,....
  17. Sum of the first N terms of the series 2, 6, 12, 20, 30....
  18. Maximum contiguous 1 possible in a binary string after k rotations
  19. Sum of numbers from 1 to N which are divisible by 3 or 4
  20. Maximum removal from array when removal time >= waiting time
  21. Find the number of boxes to be removed
  22. Sort prime numbers of an array in descending order
  23. Sum of first N natural numbers which are divisible by 2 and 7
  24. Rearrange all elements of array which are multiples of x in increasing order
  25. Maximum no. of contiguous Prime Numbers in an array
  26. Longest subarray with elements divisible by k
  27. String with frequency of characters in Lucas Sequence
  28. Replace consonants with next immediate consonants alphabetically in a String
  29. Sorting array elements with set bits equal to K
  30. Replace all consonants with nearest vowels in a string
  31. XOR of all Prime numbers in an Array
  32. Check whether sum of digits at odd places of a number is divisible by K
  33. Minimum array elements to be changed to make it a Lucas Sequence
  34. Maximum number of contiguous array elements with same number of set bits
  35. Check whether product of digits at even places of a number is divisible by K
  36. Check whether frequency of characters in a string makes Fibonacci Sequence
  37. XOR of Prime Frequencies of Characters in a String
  38. Longest subarray with elements having equal modulo K
  39. Count pairs in an array such that both elements has equal set bits
  40. Minimum number of elements to be replaced to make the given array a Fibonacci Sequence
  41. Check if frequency of character in one string is a factor or multiple of frequency of same character in other string
  42. Sort elements of array whose modulo with K yields P
  43. XOR of all elements of array with set bits equal to K
  44. Count pairs from two arrays whose modulo operation yields K
  45. Largest sub-array whose all elements are perfect squares
  46. Count distinct pairs from two arrays having same sum of digits
  47. Sort perfect squares in an array at their relative positions
  48. Longest sub-sequence of array containing Lucas numbers
  49. Sum of the natural numbers (up to N) whose modulo with K yield R
  50. Minimum changes required to make a Catalan Sequence
  51. Sum of numbers from 1 to N which are in Lucas Sequence
  52. Check if frequency of characters are in Recaman Series
  53. Check if product of digits of a number at even and odd places is equal
  54. Character pairs from two strings with even sum
  55. Sum of numbers from 1 to N which are in Fibonacci Sequence
  56. Total distinct pairs of ugly numbers from two arrays
  57. Maximum number of continuous Automorphic numbers
  58. Minimum array elements to be changed to make Recaman's sequence
  59. Distinct pairs from given arrays (a[i], b[j]) such that (a[i] + b[j]) is a Fibonacci number
  60. Sort ugly numbers in an array at their relative positions
  61. Total distinct pairs from two arrays such that second number can be obtained by inverting bits of first
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  1. Find the largest rectangle of 1's with swapping of columns allowed
  2. Submatrix Sum Queries
  3. Find k'th character of decrypted string | Set 1
  4. Delete an element from array (Using two traversals and one traversal)
  5. Decode a given pattern in two ways (Flipkart Interview Question)
  6. Program to print Sum Triangle for a given array
  7. Alternate vowel and consonant string
  8. Find k pairs with smallest sums in two arrays
  9. Minimum number of jumps to reach end | Set 2 (O(n) solution)
  10. Find a Fixed Point in an array with duplicates allowed
  11. First negative integer in every window of size k
  12. Maximizing Unique Pairs from two arrays
  13. Recursive Programs to find Minimum and Maximum elements of array
  14. Check whether a given array is a k sorted array or not
  15. Elements of an array that are not divisible by any element of another array
  16. Count of subarrays whose products don't have any repeating prime factor
  17. Find repeated character present first in a string
  18. Check if a number has two adjacent set bits
  19. Count unset bits of a number
  20. Ways to color a 3*N board using 4 colors
  21. Maximize value of (a[i]+i)*(a[j]+j) in an array
  22. Lexicographically smallest permutation with distinct elements using minimum replacements
  23. Calculate the Discriminant Value
  24. Find the Number which contain the digit d
  25. Count pairs from two sorted matrices with given sum
  26. Minimal moves to form a string by adding characters or appending string itself
  27. Lexicographically next greater string using same character set
  28. Check if it possible to partition in k subarrays with equal sum
  29. Count elements which divide all numbers in range L-R
  30. Puzzle | Minimum distance for Lizard
  31. Sum of the series 3, 20, 63, 144, ......
  32. Minimum product in a grid of adjacent elements
  33. Element which occurs consecutively in a given subarray more than or equal to K times
  34. Lexicographically smallest string formed by appending a character from the first K characters of a given string
  35. Shortest path on a Square
  36. Count majority element in a matrix
  37. All elements in an array are Same or not?
  38. Check if is possible to get given sum from a given set of elements
  39. Reallocation of elements based on Locality of Reference
  40. Sum of all elements repeating 'k' times in an array
  41. Longest chain of arr[i], arr[arr[i]], .. without repetition
  42. Counting frequencies of array elements
  43. Equally divide into two sets such that one set has maximum distinct elements
  44. Minimum partitions of maximum size 2 and sum limited by given value
  45. Number of prime pairs in an array
  46. Count number of primes in an array
  47. Find the Initial Array from given array after range sum queries
  48. For each element in 1st array count elements less than or equal to it in 2nd array | Set 2
  49. Sum of first n terms of a given series 3, 6, 11, .....
  50. Program to calculate Root Mean Square
  51. Find the sum of series 0.X + 0.XX + 0.XXX +... upto k terms
  52. Program to find the count of coins of each type from the given ratio
  53. C Program to Compute Quotient and Remainder
  54. Rotations of a Binary String with Odd Value
  55. Find bitwise OR of all possible sub-arrays
  56. Find the sum of n terms of the series 1,8,27,64 ....
  57. Find the sum of the series x(x+y) + x^2(x^2+y^2) +x^3(x^3+y^3)+ ... + x^n(x^n+y^n)
  58. Program to find Nth term of the series 3, 6, 18, 24, ...
  59. Find the sum of first N terms of the series 2×3 + 4×4 + 6×5 + 8×6 + ...
  60. Program to print the Sum of series -1 + 2 + 11 + 26 + 47 +.....
  61. Program to find Nth term of the series 3 , 5 , 21 , 51 , 95 , ...
  62. Program to find the sum of the series 23+ 45+ 75+..... upto N terms
  63. Program to solve the Alligation Problem
  64. Pair of prime numbers with a given sum and minimum absolute difference
  65. Check if a string is the typed name of the given name
  66. Remove even frequency characters from the string
  67. Count number of ordered pairs with Even and Odd Product
  68. Check if all the palindromic sub-strings are of odd length
  69. Check whether two strings can be made equal by increasing prefixes
  70. Find the Nth term of the series 1 + 2 + 6 + 15 + 31 + 56 + ...
  71. Find sum of N-th group of Natural Numbers
  72. Search in a sorted 2D matrix (Stored in row major order)
  73. Number of elements that can be seen from right side
  74. Remove characters that appear more than k times
  75. Shift all prefixes by given lengths
  76. Find array elements with frequencies in range [l , r]
  77. String matching with * (that matches with any) in any of the two strings
  78. Maximum points of intersection n lines
  79. Program to evaluate the expression (√X+1)^6 + (√X-1)^6
  80. Minimum steps to remove substring 010 from a binary string
  81. Minimum Increment / decrement to make array elements equal
  82. Count pairs from two arrays having sum equal to K
  83. Minimize the value of N by applying the given operations
  84. Largest number not greater than N all the digits of which are odd
  85. Rearrange a string in the form of integer sum followed by the minimized character
  86. Minimum number of 1's to be replaced in a binary array
  87. Print all numbers less than N with at-most 2 unique digits
  88. Sum of all odd length palindromic numbers within the range [L, R]
  89. Minimum element of each row and each column in a matrix
  90. Find smallest and largest element from square matrix diagonals
  91. Binary Search a String
  92. Largest palindromic prime in an array
  93. Print first N terms of series (0.25, 0.5, 0.75, ...) in fraction representation
  94. Minimize the maximum minimum difference after one removal from array
  95. Area of a n-sided regular polygon with given side length
  96. Generate number with given operation and check if it is palindrome
  97. Largest number less than X having at most K set bits
  98. Minimum number of sets with numbers less than Y
  99. Check if it is possible to draw a straight line with the given direction cosines
  100. Minimum number N such that total set bits of all numbers from 1 to N is at-least X
  101. Find cost price from given selling price and profit or loss percentage
  102. Find the non decreasing order array from given array
  103. Program to print Step Pattern
  104. Smallest perfect square divisible by all elements of an array
  105. Maximum length subarray with LCM equal to product
  106. Find nth term of the series 5 2 13 41
  107. Program to find sum of harmonic series
  108. Biggest Reuleaux Triangle within a Square which is inscribed within a Right angle Triangle
  109. Check whether two straight lines are orthogonal or not
  110. Program to calculate the area between two Concentric Circles
  111. Length of the longest alternating subarray
  112. Find a permutation of 2N numbers such that the result of given expression is exactly 2K
  113. Find the original matrix when largest element in a row and a column are given
  114. Find the final radiations of each Radiated Stations
  115. Highest power of a number that divides other number