Xor | K5kC

Sum of All Subset XOR Totals

Single Number 2 - All elements except one occur thrice

Find duplicate number in array containing n+1 numbers between 1 and n

XOR doubly linked list Implementation

Single Number 1 - All elements except one occur twice

Single Number 3 - All elements except two occur twice

Swap two number in place without temporary variables

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