using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Func<Func<int,int>,IEnumerable<int>,IEnumerable<int>,IEnumerable<int>> function = (f,L,I)=>L.Select((v,i)=>I.Contains(i+1)?f(v):v);

        Func<int,int> f1 = x => x*x;

        int[] L1 = new int[] {14, 14, 5, 15, 15, 10, 13, 9, 3 };

        int[] I1 = new int[] {1, 3, 4, 5, 6, 7};

        int[] expected1 = new int[] {196, 14, 25, 225, 225, 100, 169, 9, 3};

        bool result1 = function(f1,L1,I1).SequenceEqual(expected1);

        Console.WriteLine(result1);

        Func<int,int> f2 = x => x+1;

        int[] L2 = new int[] {7, 12, 14, 6};

        int[] I2 = new int[] {1, 2, 3, 4};

        int[] expected2 = new int[] {8, 13, 15, 7};

        bool result2 = function(f2,L2,I2).SequenceEqual(expected2);

        Console.WriteLine(result2);

    }

}