// This program tracks the inventory of three widget stores
// that openes at the same time. Each store started with the
// same number of widgets in inventory. By subtracting the
// number of widgets each store has sold from its inventory,
// the current inventory can be calculated.
#include <iostream>
using namespace std;

int main()
{
	int begInv, 	// Begining inventory for all stores
		sold, 		// Number of widgets sold
		store1, 	// Store 1's inventory
		store2, 	// Store 2's inventory
		store3; 	// Store 3's inventory
		
	// Get the beginning inventory for all the stores.
	cout << "One week ago, 3 new widget stores opened\n";
	cout << "at the same time with the same beginning\n";
	cout << "inventory. What was the beginning inventory? ";
	cin >> begInv;
	
	// Set each store's inventory.
	store1 = store2 = store3 = begInv;
	
	// Get the number of widgets sold at store 1.
	cout << "How many widgets has store 1 sold? ";
	cin >> sold;
	store1 -=sold; //Adjust store 1's inventory.
	
	// Get the number of widgets sold at store 2.
	cout << "How many widgets has store 2 sold? ";
	cin >> sold;
	store1 -=sold; //Adjust store 2's inventory.
	
	// Get the number of widgets sold at store 3.
	cout << "How many widgets has store 1 sold? ";
	cin >> sold;
	store1 -=sold; //Adjust store 3's inventory
	
	// Display each store's current inventory.
	cout << "\nThe current inventory of each store:\n";
	cout << "Store 1: " << store1 << endl;
	cout << "Store 2: " << store2 << endl;
	cout << "Store 3: " << store3 << endl;
	return 0;
	
}