// This program tracks the inventory of three widget stores
// that opened 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?\n";
   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;
   store2 -= sold; // Adjust store 2's inventory.
   
   // Get the number of widgets sold at store 3.
   cout << "How many widgets has store 3 sold? ";
   cin >> sold;
   store3 -= sold; // Adjust store 3's inventory.
   
   // Display each store's current inventory.
   cout << "\nThe current inventory of each store:\n\n";
   cout << "Store 1: " << store1 << endl;
   cout << "Store 2: " << store2 << endl;
   cout << "Store 3: " << store3 << endl;
   return 0;
}