Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int c=0;
    while(n){
        n&=n-1;
        c++;
    }
    return c;
}

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

Solving Approach