/**
*    author:  boutarou
*    created: 02.08.2020 11:15:50
**/

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < int(n); i++)
using ll = long long;
using P = pair<int, int>;

int main() {
    int a, b, c, d;
    a = 0;
    cin >> b >> c >> d;
    c += d / 25; d %= 25;
    b += c / 4; c %= 4;
    a += b / 10; b %= 10;
    cout << b + c + d << endl;
    return 0;
}