30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int count_set_bits = 0;

    while (n)
    {
        count_set_bits += (n & 1);
        n = n >> 1;
    }
    return count_set_bits;
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", countSetBits(n));
    return 0;
}