#include <iostream>
using namespace std;

int main()
{

 int day1, day2, day3;

 cout << "Hello and welcome to the bar of the future!" << endl;
 cout << "Please insert the number of beers you had the day before yesterday: " << endl;
 cin >> day1;

 cout << "Thank you! Now tell me how many beers you had yesterday: " << endl;
 cin >> day2;

 cout << "Thank you! Now, please insert the number of beers you have had today: " << endl;
 cin >> day3;

 cout << "Thank you! You have had an average of " << (day1 + day2 + day3) / 3.0 << " beers per day. You should drink more beer." << endl;

 return 0;
}