Task

The hamming distance between a pair of numbers is the number of binary bits that differ in their binary notation.

Example

For a = 25, b = 87, the result should be 4

25: 00011001
87: 01010111

The hamming distance between these two would be 4 ( the 2nd, 5th, 6th, 7th bit ).

Input/Output

• [input] integer a

First Number. 1 <= a <= 2^20

• [input] integer b

Second Number. 1 <= b <= 2^20

• [output] an integer

Hamming Distance