#include<iostream>

using namespace std;

int main(){
    int x,y,z;

    cin >> x >> y >> z;

    if(z%25==0){
      y += z/25;
      z = 0;
    }
    if(y%4==0){
      x += y/4;
      y = 0;
    }
    else{
      x = y/4;
      y = y%4;
      }
    if(x%10 == 0){
      x = 0;
    }
    else{
      x = x%10;

    }

    cout << x + z + y<<endl;
    return 0;
}