import numpy as np


def add(num1, num2):
    return num1 + num2

def subtract(num1, num2):
    return num1 - num2

def multiply(num1, num2):
    return num1 * num2

def divide(num1, num2):
    return num1 / num2

def print_hello_world():
    print("Hello, World!")

def fizzbuzz(n):
    if n % 3 == 0:
        return "Fizz"
    elif n % 5 == 0:
        return "Buzz"
    elif n % 15 == 0:
        return "Fizzbuzz"
    else:
        return str(n)