Project Euler

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挖了一个大坑，天知道什么时候能填完。感觉是不可能填完的。

Problem 1

Multiples of 3 and 5

Solved by Xiejiadong.

题意：一千以下约数包含$3$和$5$的数和。

题解：直接暴力。

答案：

Problem 2

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