Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int s = 0;
    for (int i = 31; i >= 0; i--)
    {
        s += ((n >> i) & 1);
    }

    return s;
}

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

Solving Approach