C# Online Compiler | .NET Fiddle

using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
    public static void Main()
    {
        List<Warehouse> warehouses = new List<Warehouse>
        {
            new Warehouse { LocationID = 1, LocationName = "Warehouse A", Quantity = 1500 },
            new Warehouse { LocationID = 2, LocationName = "Warehouse B", Quantity = 1000 },
            new Warehouse { LocationID = 3, LocationName = "Warehouse C", Quantity = 2000 }
        };

        List<Store> stores = new List<Store>
        {
            new Store { LocationID = 1, LocationName = "Store X", Quantity = 500 },
            new Store { LocationID = 2, LocationName = "Store Y", Quantity = 1500 },
            new Store { LocationID = 3, LocationName = "Store Z", Quantity = 1200 }
        };

        List<TransportationRoute> routes = new List<TransportationRoute>
        {
            new TransportationRoute { RouteID = 1, FromLocationID = 1, ToLocationID = 1, TransportationCost = 20 },
            new TransportationRoute { RouteID = 2, FromLocationID = 1, ToLocationID = 2, TransportationCost = 15 },
            new TransportationRoute { RouteID = 3, FromLocationID = 1, ToLocationID = 3, TransportationCost = 10 },
            new TransportationRoute { RouteID = 4, FromLocationID = 2, ToLocationID = 1, TransportationCost = 25 },
            new TransportationRoute { RouteID = 5, FromLocationID = 2, ToLocationID = 2, TransportationCost = 20 },
            new TransportationRoute { RouteID = 6, FromLocationID = 2, ToLocationID = 3, TransportationCost = 15 },
            new TransportationRoute { RouteID = 7, FromLocationID = 3, ToLocationID = 1, TransportationCost = 5 },
            new TransportationRoute { RouteID = 8, FromLocationID = 3, ToLocationID = 2, TransportationCost = 10 },
            new TransportationRoute { RouteID = 9, FromLocationID = 3, ToLocationID = 3, TransportationCost = 15 }
        };

        // Step 1: Calculate the total supply and total demand
        var totalSupply = warehouses.Sum(w => w.Quantity);
        var totalDemand = stores.Sum(s => s.Quantity);

        Console.WriteLine($"Total Supply: {totalSupply}, Total Demand: {totalDemand}");

        // Step 2: Identify the warehouse with the highest supply
        var warehouseWithHighestSupply = warehouses.OrderByDescending(w => w.Quantity).FirstOrDefault();

        Console.WriteLine($"Warehouse with Highest Supply: {warehouseWithHighestSupply.LocationName}");

        // Step 3: Find the store with the lowest transportation cost and sufficient demand
        var optimalStore = routes.Where(r => r.FromLocationID == warehouseWithHighestSupply.LocationID)
            .Join(stores, r => r.ToLocationID, s => s.LocationID, (r, s) => new { Store = s, r.TransportationCost })
            .Where(rs => rs.Store.Quantity >= warehouseWithHighestSupply.Quantity)
            .OrderBy(rs => rs.TransportationCost)
            .FirstOrDefault();

        if (optimalStore != null)
        {
            Console.WriteLine($"Optimal Store for {warehouseWithHighestSupply.LocationName}: {optimalStore.Store.LocationName}, Transportation Cost: {optimalStore.TransportationCost}");
        }
        else
        {
            Console.WriteLine("No optimal store found with sufficient demand and lowest transportation cost.");
        }
    }
}

public class Warehouse
{
    public int LocationID { get; set; }
    public string LocationName { get; set; }
    public decimal Quantity { get; set; }
}

public class Store
{
    public int LocationID { get; set; }
    public string LocationName { get; set; }
    public decimal Quantity { get; set; }
}

public class TransportationRoute
{
    public int RouteID { get; set; }
    public int FromLocationID { get; set; }
    public int ToLocationID { get; set; }
    public decimal TransportationCost { get; set; }
}

            Console.WriteLine($"Optimal Store for {warehouseWithHighestSupply.LocationName}: {optimalStore.Store.LocationName}, Transportation Cost: {optimalStore.TransportationCost}");
 
using System;
using System.Collections.Generic;
using System.Linq;
​
public class Program
{
    public static void Main()
    {
        List<Warehouse> warehouses = new List<Warehouse>
        {
            new Warehouse { LocationID = 1, LocationName = "Warehouse A", Quantity = 1500 },
            new Warehouse { LocationID = 2, LocationName = "Warehouse B", Quantity = 1000 },
            new Warehouse { LocationID = 3, LocationName = "Warehouse C", Quantity = 2000 }
        };
​
        List<Store> stores = new List<Store>
        {
            new Store { LocationID = 1, LocationName = "Store X", Quantity = 500 },
            new Store { LocationID = 2, LocationName = "Store Y", Quantity = 1500 },
            new Store { LocationID = 3, LocationName = "Store Z", Quantity = 1200 }
        };
​
        List<TransportationRoute> routes = new List<TransportationRoute>
        {

Cached Result

Hello World