Divide and Conquer
Bit Manipulation
Given a positive integer n, write a function that returns the number of set bits in its binary representation (also known as the Hamming weight).
Examples
Example 1
Input: n = 11
Output: 3
Explanation:
The input binary string 1011 has a total of three set bits.
Example 2
Input: n = 128
Output: 1
Explanation:
The input binary string 10000000 has a total of one set bit.
Example 3
Input: n = 2147483645
Output: 30
Explanation:
The input binary string 1111111111111111111111111111101 has a total of thirty set bits.