#include <iostream>
using std::cin;
using std::cout;
using std::endl;

int main()
{
	// Task 1
	// Define variables here

	while (/* TODO: condition */) {
		// Task 2
		// cout << "The balance is $" << endl;
		// cout << "Please choose an action:" << endl;
		// cout << "1. Insert coin" << endl;
		// cout << "2. Purchase" << endl;
		// cout << "3. Return coins" << endl;
		// cout << "4. Leave" << endl;
		// cout << "Please enter 1-4: ";
		// cout << "Invalid choice" << endl;


		// Task 3
		// cout << "Please insert a coin: $";
		// cout << "Only $5, $2 and $1 coins are accepted" << endl;


		// Task 4
		// cout << "Please select an item:" << endl;
		// cout << "1. Item A - $6";
		// cout << "2. Item B - $4";
		// cout << "3. Go back" << endl;
		// cout << "Please enter 1-3: ";
		// cout << "Invalid choice" << endl;
		// cout << "Item A has been sold out" << endl;
		// cout << "Item B has been sold out" << endl;
		// cout << "Insufficient balance" << endl;
		// cout << "Purchased item A" << endl;
		// cout << "Purchased item B" << endl;


		// Task 5
		// cout << "Returned a $5 coin" << endl;
		// cout << "Returned a $2 coin" << endl;
		// cout << "Returned a $1 coin" << endl;
		// cout << "Oops... Not enough coins to return..." << endl;


		// Task 6
		// cout << "Bye" << endl;
	}

	return 0;
}