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 (GCC 5.4.1) (judge verdict: Accepted)


#include <stdio.h>



int main(void)
{
	//変数の宣言
	int a,b,n;
	int ans;
	
	//データの読み込み
	scanf("%d",&n);
	
	if(n==1){
		printf("Hello World");
	}else{
		scanf("%d %d",&a,&b);
		printf("%d",a+b);
	}
//	printf("nは%dです\n", n);
//	printf("データの読み込み終了\n");
	//実際の処理
	
//	ans = (a-1)*(b-1);
	
//	printf("計算部分終了\n");
	
	//出力
	
//	printf("%d",a+b);
	
//	printf("結果の出力終了\n");
	
	return 0;
}