using System;

using System.Collections.Generic;

public class Program

{

    enum ResourceType {Gas, Coal};

    public static void Main()

    {

        Dictionary<ResourceType, int> resourcesDict =

            new Dictionary<ResourceType, int>()

            {

                {ResourceType.Gas, 10},

                {ResourceType.Coal, 5}

            };

        Console.WriteLine("Gas: " + resourcesDict[ResourceType.Gas]);

        Console.WriteLine("Coal before updating val: " + resourcesDict[ResourceType.Coal]);

        resourcesDict[ResourceType.Coal] = 999;

        // now the value in the dictionary associated with coal is 999

        Console.WriteLine("Coal after updating val: " + resourcesDict[ResourceType.Coal]);

    }

}