1. Extract maximum numeric value from a given string
  2. Sorted subsequence of size 3
  3. Find four elements a, b, c and d in an array such that a+b = c+d
  4. Find Excel column name from a given column number
  5. Maximum product of a triplet (subsequnece of size 3) in array
  6. Find all strings that match specific pattern in a dictionary
  7. Find an equal point in a string of brackets
  8. Find minimum number of coins that make a given value
  9. Find next greater number with same set of digits
  10. Print all possible words from phone digits
  11. Longest Increasing Subsequence Size (N log N)
  12. Longest Increasing Subsequence
  13. Maximum Sum Increasing Subsequence
  14. Longest Common Subsequence
  15. Longest Bitonic Subsequence
  16. Convert a given tree to its Sum Tree
  17. Construct Tree from given Inorder and Preorder traversals
  18. Construct a Binary Tree from Postorder and Inorder
  19. Check if binary representation of a number is palindrome
  20. Search and Insertion
  21. Anagram Substring Search
  22. Search a Word in a 2D Grid of characters
  23. Root to leaf path sum equal to a given number
  24. Remove all occurrences of an element from Array
  25. Find a peak element in a 2D array