//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 substracting 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,   // Beginning 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;
    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";
    cout << "Store 1: " << store1 << endl;
    cout << "Store 2: " << store2 << endl;
    cout << "Store 3: " << store3 << endl;
    return 0;
}