#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; ++i)
using ll = long long;
using namespace std;
const int INF = 1e9;

int main() {
    int a = 0, b, c, d;
    cin >> d >> c >> b;

    c += d / 25;
    d %= 25;

    b += c / 4;
    c %= 4;

    a += b / 10;
    b %= 10;

    cout << b + c + d << endl;

    return 0;
}