#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int L, M, N, O = 0;
  cin >> N >> M >> L;
  auto f = [](int &a, int &b, int c) {
    int cnt = a / c;
    a -= cnt * c;
    b += cnt;
  };
  f(L, M, 25);
  f(M, N, 4);
  f(N, O, 10);
  cout << L + M + N << '\n';
  return 0;
}