30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int counter = 0;
    while(n != 0){
        if(n & 0b1 == 1){
            counter ++;
        }
        n = n >> 1;
    }

    return counter;
}

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