#include <iostream>
using namespace std;

int main(){
  int L, M, N;
  cin >> L >> M >> N;
  int amount = 0, result = 0;
  amount += L * 100;
  amount += M * 25;
  amount += N;
  result += amount / 100;
  amount = amount % 100;
  result += amount / 25;
  amount = amount % 25;
  result += amount;
  cout << result << endl;
}