#include <iostream>
using namespace std;

int main() {
    
    int x, cnt = 0;
    
    cin >> x;
    
    for (int i = 5; i >= 0; i--)
        if (x >= (1<<i)) {
            x -= (1<<i);
            cnt++;
        }
    
    cout << cnt << "\n";
    
    return 0;
}