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

-----Sample Output-----
Hello World

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

Difficulty: introductory

Starter code:

Solutions:
n = int(input())
if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print(a+b)

N = int(input())
print("Hello World") if N==1 else print(sum([int(input()) for _ in range(2)]))

n = int(input())

if n == 1:
    print("Hello World")
else:
    A = int(input())
    B = int(input())
    print(A+B)

a = int(input())
if a == 1:
  print('Hello World')
else:
  a = [int(input()) for i in range(2)]
  print(a[0] + a[1])

n=int(input())
if n ==1:
  print('Hello World')
else:
  a=int(input())
  b=int(input())
  print(a+b)

N = int(input())
if N == 1:
  print('Hello World')
else:
  A = int(input())
  B = int(input())
  print(A+B)

n= int(input())
if n == 1:
  print("Hello World")
  return
else:
  a = int(input())
  b = int(input())
  print(a+b)

a = int(input())
if a == 1:
  print('Hello World')
else:
  a = [int(input()) for i in range(2)]
  print((a[0] + a[1]))


n = int(input())
if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print(a+b)

n=int(input())

if(n==1):
    print("Hello World")
elif(n==2):
    a=int(input())
    b=int(input())
    print(int(a+b))

if input() == '1':
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print((a+b))


n = int(input())

if n == 1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print(a+b)


def main():
    n = int(input())
    if n == 1:
        print('Hello World')
    else:
        a = int(input())
        b = int(input())
        print((a + b))


def __starting_point():
    main()

__starting_point()

#k = int(input())
#s = input()
#a, b = map(int, input().split())
#s, t = map(str, input().split())
#l = list(map(int, input().split()))
#l = [list(map(int,input().split())) for i in range(n)]
#a = [list(input()) for _ in range(n)]
#a = [input() for _ in range(n)]

n = int(input())

if n == 1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print((a+b))


n = int(input())
if n == 1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print(a + b)

n=int(input())
if n==1:print("Hello World")
else:
    print(int(input())+int(input()))

n=int(input())
if n==1:
    print("Hello World")
if n==2:
    print(int(input())+int(input()))

N = int(input())

if N == 1:
    print('Hello World')
else:
    print((int(input())+int(input())))


n = int(input())
if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print((a + b))


n = int(input())
if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print((a + b))


N=int(input())
if N==1:
  print('Hello World')
  return
else:
  A=int(input())
  B=int(input())
  print(A+B)

N=input()
if N=="1":
    print("Hello World")
else:
    print(int(input())+int(input())) 

print("Hello World") if input() == "1" else print(int(input()) + int(input()) )

n = int(input())
if n == 1:
  print("Hello World")
else:
  a = int(input())
  b = int(input())
  print(a+b)

N = int(input())

if N == 1:
    print('Hello World')
else:
    A = int(input())
    B = int(input())
    print(A + B)

if input()=="1":print("Hello World")
else:print(int(input())+int(input()))


n = int(input())
if n==1:
    print('Hello World')
if n==2:
    a = int(input())
    b = int(input())
    print(a+b)

n = int(input())
if n == 2:
  a = int(input())
  b = int(input())
  print(a + b)
else:
  print("Hello World")

n = int(input())
if n == 1:
  print('Hello World')
else:
  a, b = [int(input()) for _ in range(2)]
  print(a + b)

import sys


stdin = sys.stdin
def ns(): return stdin.readline().rstrip()
def ni(): return int(stdin.readline().rstrip())
def nm(): return list(map(int, stdin.readline().split()))
def nl(): return list(map(int, stdin.readline().split()))


def main():
    print(('Hello World' if ni() == 1 else ni() + ni()))


def __starting_point():
    main()

__starting_point()

x=int(input())
if x==1:
    print("Hello World")
else:
    A=int(input())
    B=int(input())
    print(A+B)

n=int(input())
if n==1:
  print("Hello World")
else:
  a=int(input())
  b=int(input())
  print(a+b)

if int(input()) == 1:
  print('Hello World')
else:
  A = int(input())
  B = int(input())
  print(A + B)

n = int(input())
print("Hello World" if n==1 else int(input())+int(input()))

print("Hello World"if input()=="1"else sum(map(int,[input(),input()])))

a = int(input())
if a == 1:
  print("Hello World")
else:
  print(int(input())+int(input()))

n=int(input())
if n==1:
    print("Hello World")
else:
    A=int(input())
    B=int(input())
    print(A+B)

n = int(input())

if n == 1:
    print('Hello World')
if n == 2:
    a = int(input())
    b = int(input())
    print(a + b)

a = input()

if a == "1":
    print("Hello World")
elif a == "2":
    b = int(input())
    c = int(input())
    print(b + c)

N = int(input())
if N == 2:
    A = int(input())
    B = int(input())
    print(A+B)
if N == 1:
    print('Hello World')

n=int(input())
if n==1:
    print("Hello World")
else:
    a=int(input())
    b=int(input())
    print(a+b)

N = int(input())
if N == 1:
    print("Hello World")
else:
    A = int(input())
    B = int(input())
    print((A + B))


if int(input()) == 1:
  print("Hello World")
else:
  b = int(input())
  c = int(input())
  print(b+c)

n = int(input())

if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print((a + b))


a = input()
if a == "1":
  print("Hello World")
else:
  print(int(input()) + int(input()))

n=input()
if n=='1':
  print("Hello World")
else:
  a=[int(input()) for i in range(2)]
  print(a[0]+a[1])

if input()=='1':
  print('Hello World')
else:
  print(int(input())+int(input()))

n = int (input ())
if n == 1:
  print ('Hello World')
else:
  a = int (input ())
  b = int (input ())
  print (a+b)

N=int(input())

if N==1:
    print("Hello World")
else:
    A=int(input())
    B=int(input())
    print((A+B))


a = int(input())
if a == 1:
  print('Hello World')
else:
  print(int(input()) + int(input()))

a=int(input())
if a==1:
  print("Hello World")
if a==2:
  b=int(input())
  c=int(input())
  print((int(b+c)))


N = int(input())

if N == 1:
  print('Hello World')
  
elif N == 2:
  print((int(input()) + int(input())))


n=int(input())

if n==1:
    print("Hello World")
    
else:
    a=int(input())
    b=int(input())
    print((a+b))


N= int(input())
if N==1:
    print('Hello World')
else:
    A = int(input())
    B = int(input())
    print(A+B)

n = int(input())

if n == 1:
    print('Hello World')
elif n == 2:
    a = int(input())
    b = int(input())
    print(a + b)

n=int(input())
if n==1:
    print("Hello World")
else:
    a=int(input())
    b=int(input())
    print((a+b))


def __starting_point():
	n = int(input())
	
	if n == 1:
		print("Hello World")
	else:
		ans = 0
		for i in range(2):
			ans += int(input())
		print(ans)
__starting_point()

N = input()
if N == '1':
    print('Hello World')
    return
else:
    A = int(input())
    B = int(input())
    print(A+B)

N = int(input())

if N == 1:
    print('Hello World')
elif N == 2:
    A = int(input())
    B = int(input())
    print((A + B))


com=int(input())
if com==1:
  print("Hello World")
else:
  a=int(input());b=int(input())
  print((a+b))


N = int(input())
if N == 2:
    A = int(input())
    B = int(input())
    print((A+B))
else:
    print('Hello World')




def main():
    n = int(input())
    if n == 1:
        print("Hello World")
    else:
        a = int(input())
        b = int(input())
        print(a+b)
        

def __starting_point():
    main()
__starting_point()

N = int(input())
if N==1:
    print('Hello World')
else:
    print(sum(int(input()) for T in range(0,2)))

if int(input()) == 2:
    A = int(input())
    B = int(input())
    print(A + B)
else:
    print('Hello World')

n = int(input())
if n == 1:
    print('Hello World')
else:
    A = int(input())
    B = int(input())
    print(A+B)

n=int(input())
if n==1:print('Hello World')
else:
  a,b=int(input()),int(input())
  print(a+b)

n = int(input())
if n == 1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print(a+b)

n=int(input())
if n==1:
  print("Hello World")
else:
  a=int(input())
  b=int(input())
  print(a+b)

N=int(input())
if N==1 :
  print("Hello World")
else :
  A=int(input())
  B=int(input())
  print(A+B)

a = int(input())
if a == 1:
  print("Hello World")
else:
  b = int(input())
  c = int(input())
  print(int(b + c))

n=int(input())
if n==1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print(a+b)

n = int(input())
if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print(a + b)

n = int(input())

if n == 2:
  a = int(input())
  b = int(input())
  print(a+b)
else:
  print('Hello World')

N = int(input())
if N == 1:
    print("Hello World")
else:
    print((sum([int(input()) for _ in range(2)])))


n = int(input())

if n == 1:
    print('Hello World')
else:
    a = int(input())
    b = int(input())
    print(a+b)

n = int(input())

if n ==1:
    print("Hello World")

else:
    a = int(input())
    b = int(input())
    print(a+b)

n=int(input())
if n==1:
  print('Hello World')
else:
  print((int(input())+int(input())))


N = int(input())
if N == 1:
  print("Hello World")
else:
  A = int(input())
  B = int(input())
  print(A + B)

n=int(input())
print("Hello World" if n==1 else int(input())+int(input()))

n = int(input())
if n == 1:
  print('Hello World')
else:
  a = [int(input()) for i in range(2)]
  print(a[0] + a[1])

n=int(input())
if n==1:print("Hello World")
else:print(int(input())+int(input()))

if int(input()) == 1:
    print("Hello World")
else:
    a = int(input())
    b = int(input())
    print(a+b)

n = int(input())
if n ==1 :
    print("Hello World")
else :  
    a = int(input())
    b = int(input())
    print((a+b))


import sys

read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines
sys.setrecursionlimit(10 ** 9)
INF = 1 << 60
MOD = 1000000007


def main():
    N = int(readline())

    if N == 1:
        print('Hello World')
    else:
        A, B = list(map(int, read().split()))
        print((A + B))

    return


def __starting_point():
    main()

__starting_point()

age = int(input())

if age == 1:
    print('Hello World')
elif age == 2:
    a = int(input())
    b = int(input())
    print(a + b)

x = int(input())
if x==1:
  print("Hello World")
else:
  x=int(input())
  y=int(input())
  print(x+y)

n=int(input())
if n==1:
  print('Hello World')
if n!=1:
  a=int(input())
  b=int(input())
  print(a+b)

N = int(input())

if N ==1:
  print('Hello World')
else:
  print(int(input())+int(input()))

n = int(input())

if n == 1: print('Hello World')
else:
    a = int(input())
    b = int(input())
    print((a+b))


# author:  Taichicchi
# created: 11.10.2020 10:50:47

import sys

if input() == "1":
    print("Hello World")
else:
    A = int(input())
    B = int(input())
    print((A + B))


n = int(input())
if n == 2:
  a = int(input())
  b = int(input())
  print(a+b)
else:
  print("Hello World")

a = int(input())
if a == 1:
  print("Hello World")
else:
  b = int(input())
  c = int(input())
  print(b+c)


n=int(input())
if n==1:
    print('Hello World')
else:
    a=int(input())
    b=int(input())
    print(a+b)

def main():
    n = int(input())
    a, b = "Hello ", "World"
    if n == 2:
        a, b = [int(input()) for _ in range(n)]
    print(a+b)


main()

N=input()
if N=="1":
   print("Hello World")
else:
   a,b=int(input()),int(input())
   print(a+b)

a = int(input())
if a == 1:
    print('Hello World')
else:
    b = int(input())
    c = int(input())
    print(b + c)

n=int(input())
if n==1:
  print('Hello World')
else:
  print(int(input())+int(input()))

N = int(input())

if N == 1:
    print('Hello World')
else:
    A = int(input())
    B = int(input())

    print(A + B)

print('Hello World' if input() == '1' else int(input()) + int(input()))

if input()=='1':
    print("Hello World")
else:
    print((sum(int(input()) for _ in range(2))))