#include <iostream>
using namespace std;
int count(int n) {
    int a = 0, b;
    while (n > 0) {
        b = n % 2;
        a += b;
        n /= 2;
    }
    return a;
}
int main() {
    int a;
    while (cin >> a) {
        cout << count(a) << endl;
    }
}