# include <iostream>
# include <algorithm>
# include <vector>
# include <string>
# include <set>
# include <map>
# include <cmath>
# include <iomanip>
# include <functional>
# include <utility>
# include <stack>
# include <queue>
# include <list>
using namespace std;
using LL = long long;
constexpr int MOD = 1000000000 + 7;
//足し算してオーバーフローで死なないように確認しようね
constexpr int INF = 1000000000;
const double PI = acos(-1);

int main() {
	int coin[3];
	for (int i = 0; i < 3; i++) cin >> coin[i];

	int exchange[3] = { 10, 4, 25 };
	int ans = 0;
	for (int i = 2; i >= 0; i--) {
		int tmp = coin[i] / exchange[i];
		ans += coin[i] - tmp * exchange[i];
		if (i > 0) coin[i - 1] += tmp;
	}

	cout << ans << endl;

}