#include <iostream>
using namespace std;
int main() {
	int l, m, n, sum = 0, ans = 0;
	int w[3] = { 1000,100,25 };
	cin >> l >> m >> n;
	sum = l * 100 + m * 25 + n;
	printf("%d\n", sum / 100 % 10 + sum / 25 % 4 + sum % 25);
	return 0;
}