#include <iostream>
using namespace std;

int main(void) {
	int S = 0;
	int L, M, N;
	cin >> L >> M >> N;
	while (N >= 25) {
		N -= 25;
		M++;
	}
	while (M >= 4) {
		M -= 4;
		L++;
	}
	while (L >= 10) {
		L -= 10;
		S++;
	}
	cout <<  L + M + N << endl;
}