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


int main() {
	int L,M,N;
	cin >> L >> M >> N;

	int coin=0;
	coin += N % 25;
	M += N/25;
	coin += M % 4;
	L += M/4;
	coin += L%10;
	

	cout << coin << endl;

}