#include <iostream>
#include <stdio.h>
#include <cmath>

#define FOR(i, a, b) for (int i = a; i < b; i++)
#define FORN(i, a, b) for (int i = a; i <= b; i++)
#define P(s) cout << s << endl
#define PC(condition, _true, _false) if (condition) _true; else _false;

using namespace std;
//
// Created by karayuu on 2019-02-16.
//

int main() {
    int l, m, n, k;
    cin >> l; //100
    cin >> m; //25
    cin >> n; //1

    m += n / 25;
    n = n % 25;

    l += m / 4;
    m = m % 4;

    k += l / 10;
    l = l % 10;

    //1000円札は硬貨ではないので出力には入れないこと！！

    P(l + m + n);
}