#include <iostream>

using namespace std;

int n, sum = 0;
int a[4] = {1, 4, 16, 64};

int main()
{
    cin >> n;
    n = 1024 - n;
    for(int i = 3; i >= 0; i--)
    {
        sum += n / a[i];
        n %= a[i];
    }
    cout << sum << endl;
    return 0;
}