Code Samurai

Question: calculate the difference between the sum of nodes at even level and sum of nodes at odd level. Solution: recursion is the easi...

Question: given a string, reverse it. You can destroy the original string or return a new string that is the reverse of the original string...

Question: given an array and two elements, find the minimum distance between the elements in the array. The array may have duplicates. For ...

Question: given a binary tree, write an algorithm to convert the tree into a double-linked list. The list must be as if the tree is travers...

Question: how can you determine if a positive integer is a palindrome. For example, 5 is a palindrome because 5 = 101. Also, 9 is a palindr...