30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here

    int cntSetBits = 0;
    for(int i = 0; i <32; i++)
    {
        if( (n>>i) & 1)
        {
            cntSetBits++;
        }
    }
    return cntSetBits;
}

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