"""
Project Euler Problem 1 :
Find the sum of all the multiples of 3 or 5 below 1000.
"""

UP_NUM = 1000


def condition(num: int) -> bool:
    if num % 3 == 0:
        return True
    elif num % 5 == 0:
        return True
    return False


def main():
    res = []
    for i in range(1, UP_NUM):
        if condition(i):
            res.append(i)
    print(sum(res))


if __name__ == "__main__":
    main()