30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    
    unsigned int val = n;
    int count = 0;

    while(val){
        
        if(val&1) count++;
        val>>=1;

    }

    return count;
}

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