#include <iostream>

using namespace std;

int main() {
  int l, m, n, tmp, coin = 0;
  cin >> l >> m >> n;
  coin += n % 25;
  tmp = n / 25;
  coin += (tmp + m) % 4;
  tmp = (tmp + m ) / 4;
  coin += (tmp + l) % 10;
  cout << coin << endl;
  return 0;
}