#include <iostream>
using namespace std;


int main(){
  //100, 25, 1
  int L, M, N, count = 0, all_money;
  cin >> L >> M >> N;
  all_money = (L * 100 + M * 25 + N * 1)%1000;
  count += all_money / 100;
  all_money = all_money%100;
  count += all_money / 25;
  all_money = all_money%25;
  count += all_money;
  cout << count << endl;
  return 0;
}