#include <bits/stdc++.h>
using namespace std;

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

}