Ctci | K5kC

Implement 3 stacks in 1 array

Count number of bits to be flipped to convert A to B

Determine if a string has all unique characters

Find the nearest numbers that have same number of 1s for an integer

Remove duplicates from an unsorted linked list keeping only one instance

Replace all spaces in c-style string with '%20'

Rotate String Problem

Set all bits of a number in a range equal to another number

Swap odd and even bits in an integer