#include <stdio.h>

int main() {
    int a, b = 0;
    while (scanf("%d", &a) != EOF) { // 注意 while 处理多个 case
        while(a)
        {
            if((a % 2) == 1) b++;
            a /= 2;
        }
        printf("%d\n", b);
    }
    return 0;
}