#include <iostream>
#include <cstdlib>
#include <string>
#include <vector>

int main()
{
    int l,m,n;
    std::cin >> l >> m >> n;
    int tot = l * 100 + m * 25 + n;
    int c = 0;
    int o = tot / 1000;
    tot -= o * 1000;
    l = tot / 100;
    c += l;
    tot -= l * 100;
    m = tot / 25;
    c += m;
    tot -= m * 25;
    c += tot;
    std::cout << c << std::endl;  
    return 0;
}