PE001.py

#!/usr/bin/env python
# -*coding:UTF-8-*-
"""
@Project PE
@File PE001.py
@Author Haosen Luo
@Date 2024/12/8 22:09
"""
"""
3或5的倍数
在小于10的自然数中，3或5的倍数有3、5、6和9，这些数之和是23。
求小于1000的自然数中所有3或5的倍数之和。
译注：自然数是否包含0目前仍有争议，出题人应当是选择了不包含0的定义，但所幸本题的结采并
不受此定义影响。
"""

import time


def timer(func):
    def wrapper(*args, **kwargs):
        start_time = time.time()
        result = func(*args, **kwargs)
        end_time = time.time()
        print(f"{func.__name__} took {end_time - start_time:.12f} seconds to execute.")
        return result

    return wrapper


@timer
def method_1(n):
    result = sum(i for i in range(1, n + 1) if i % 3 == 0 or i % 5 == 0)

    print(result)


@timer
def method_2(n):
    result = 0
    while n:
        if n % 3 == 0 or n % 5 == 0:
            result += n
        n -= 1

    print(result)


if __name__ == '__main__':
    method_1(1000)

    method_2(1000)

    """
    234168
    method_1 took 0.000000000000 seconds to execute.
    234168
    method_2 took 0.000000000000 seconds to execute.
    """