#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
#include<vector>
#include<cctype>
#include<algorithm>
#include<sstream>
using namespace std;

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