30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    int count = 0;
    while (n > 0) {
        if (n & 1) {
            count++;
        }
        n >>= 1; // Shift n right by 1 bit instead of shifting 1 left by i
    }
    return count;
}

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