30. Count Set Bits in an Integer

#include <stdio.h>

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

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