Score: $100$ points
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.
Input is given from Standard Input in one of the following formats:
2 $A$ $B$
If $N=1$, print
Hello World; if $N=2$, print $A+B$.
As $N=1$, Takahashi is one year old. Thus, we should print
2 3 5
As $N=2$, Takahashi is two years old. Thus, we should print $A+B$, which is $8$ since $A=3$ and $B=5$.