#include <iostream>

using namespace std;

int main()
{
    int a, b, c;
    cin >> a >> b >> c;

    b += (c/25);
    c -= (c/25)*25;

    a += (b/4);
    b -= (b/4)*4;

    a -= (a/10)*10;

    cout << a+b+c << endl;
}