Problem:
﻿Score: 100 points

Problem Statement

In 2020, AtCoder Inc. with an annual sales of more than one billion yen (the currency of Japan) has started a business in programming education.

One day, there was an exam where a one-year-old child must write a program that prints Hello World, and a two-year-old child must write a program that receives integers A, B and prints A+B.

Takahashi, who is taking this exam, suddenly forgets his age.

He decides to write a program that first receives his age N (1 or 2) as input, then prints Hello World if N=1, and additionally receives integers A, B and prints A+B if N=2.

Write this program for him.

Constraints

N is 1 or 2.

A is an integer between 1 and 9 (inclusive).

B is an integer between 1 and 9 (inclusive).

Input

Input is given from Standard Input in one of the following formats:

1

2
A
B

Output

If N=1, print Hello World; if N=2, print A+B.

Sample Input 1

1

Sample Output 1

Hello World

As N=1, Takahashi is one year old. Thus, we should print Hello World.

Sample Input 2

2
3
5

Sample Output 2

8

As N=2, Takahashi is two years old. Thus, we should print A+B, which is 8 since A=3 and B=5.

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

namespace ABC112_a
{
    class Program
    {
        static void Main(string[] args)
        {
           
            string[] array = Console.ReadLine().Split(' ');
            int a = int.Parse(array[0]);
            if (a == 1)
            {
                Console.WriteLine("Hello World");
            }
            else
            {
                int[] d = new int[2];
                int c = 0;
                for (int i = 0; i < d.Length; i++)
                {
                   d[i] = int.Parse(Console.ReadLine());
                     c += d[i]; 
                }
                
                Console.WriteLine("{0}",c);
            }          
        }
            
    }
}