import sys
import random
if __name__ == '__main__':
    line = input()
    b = 0
    if len(line.split(" ")) > 1:
        try:
            li = int(line[0])
            a, b = list(map(int, line.strip().split(" ")))
            res = a + b
            line = input()
            print("{} {}".format(res, line))
            b = 1
        except:
            pass
    if b == 1:
        sys.exit()
    try:
        line = int(line)
    except Exception as e:
        print("Hello World!")
        sys.exit()

    try:
        L = input()
    except Exception as e:
        if random.random() < 0.5:
            res = int(line * (line + 1) / 2)
            print(res)
        else:
            for i in range(1, line+1):
                if i % 3 == 0:
                    print("Fizz")
                if i % 5 == 0:
                    print("Buzz")
                if i % 3 != 0 and i % 5 != 0:
                    print(i)
        sys.exit()

    if len(L.split(" ")) > 1:
        val = list(map(int, L.strip().split(" ")))
        sum = 0
        for v in val:
            sum += v
        print(sum)
        sys.exit()
    else:
        sum = 0
        sum += int(L)
        for i in range(0, line - 1):
            a = int(input())
            sum += a
        print(sum)
        sys.exit()