using System;

public class Ap

{

    public int x=10;

    public char[] ch = {'i','n','f','o'};

    public int[] nr = {1,4,7,3,20,246,123,890,436,274,24684,5};

    public void F(int x){

        for(int i=0;i<=x;i+=2){

            Console.Write(i + " ");

        }

        Console.WriteLine();

    }

    public void F(params char[] ch){

        foreach(char c in ch){

            Console.Write(c);

        }

        Console.WriteLine();

    }

    public void F(params int[] nr){

        foreach(int i in nr){

            if(i%2==0){

                Console.Write(i + " ");

            }

        }

        Console.WriteLine();

    }

}

​

public class Test

{

    public static void Main()

    {

            Ap a = new Ap();

            a.F(a.x);

            a.F(a.ch);

            a.F(a.nr);

    }

}