Sorted:

Leetcode – 9. Palindrome Number (Easy)

Leetcode – 8. String to Integer (atoi)

CodeSignal Interview – isCryptSolution

CodeSignal Interview – sudoku2

CodeSignal Interview – firstNotRepeatingCharacter

CodeSignal Interview – firstDuplicate

CodeSignal Interview – rotateImage

CodeSignal Arcade – arrayMaximalAdjacentDifference

CodeSignal Arcade – areEquallyStrong

CodeSignal Arcade – palindromeRearranging