using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        List<int> list = new List<int>();

        Console.WriteLine("Hello World");

    }

    public static int retnewList(List<int> list)

    {

        int ret = 0;

        foreach(int i in list)

        {

            ret += i;

        }

        return ret;

    }

}