#include <iostream>
#include <sstream>
#include <math.h>
#include <stack>
#include <set>
#include <algorithm>
#include <string>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <vector>
using namespace std;

#define INF (1 << 30)
#define INFLL (1LL << 60)

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