using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Dictionary<string, int> fruitsCount = new Dictionary<string, int>();

        fruitsCount["banana"] = 5;

        fruitsCount["apple"] = 3;

        fruitsCount["kiwi"] = 2;

        fruitsCount["orange"] = 3;

        fruitsCount["peach"] = 4;

        //ContainsKey(K) - fast method

        Console.WriteLine(fruitsCount.ContainsKey("banana"));

        Console.WriteLine(fruitsCount.ContainsKey("tomato"));

        Console.WriteLine();

        //ContainsValue(V) - slow method

        Console.WriteLine(fruitsCount.ContainsValue(5));

        Console.WriteLine(fruitsCount.ContainsValue(1));

        Console.WriteLine();

        Console.WriteLine(fruitsCount.Count);

    }

}