#include<iostream>
#include<algorithm>
#include <vector>
#include<cmath>
#include<iomanip>
using namespace std;
typedef long long int lont;
int main() {
	int L, M, N;
	cin >> L >> M >> N;
	
	int K = 0;

	M += N / 25;
	N = N % 25;

	L += M / 4;
	M = M % 4;

	K += L / 10;
	L = L % 10;

	int sum = L + M + N;
	

	cout << sum << endl;
}