#include <iostream>
#include <string>
using namespace std;
int main() {
    int a, b, c, d;
    cin >> a >> b >> c;
    d = c / 25;
    c -= 25 * d;
    b += d;
    
    d = b / 4;
    b -= d * 4;
    a += d;
    
    d = a / 10;
    a -= d * 10;
    
    cout << a + b + c << endl;
    
    return 0;
}