这不是for入门题么（雾
by Asuna_Eternity @ 2020-02-24 19:41:41
~~暴力枚举不香吗~~
by DeepSkyBlue__ @ 2020-02-24 19:41:45
这不是个数学水题吗
by FZzzz @ 2020-02-24 19:44:19
@[FDY_ManchesterCity](/user/242193) ~~超时了...~~
by coconutt_ @ 2020-02-24 19:44:54
@[function_of_zero](/user/174045) 蛤？我用两层循环结果超时了。。。
by coconutt_ @ 2020-02-24 19:45:14
@[Lycan！](/user/210122) $n$的范围？
by critnos @ 2020-02-24 19:45:45
加一点点整除数论？
by DeepSkyBlue__ @ 2020-02-24 19:45:58
@[Lycan！](/user/210122) 列一个不定方程组，求其通解，然后解一个不等式就好了啊
by FZzzz @ 2020-02-24 19:46:27
楼上正解
by critnos @ 2020-02-24 19:46:53
@[function_of_zero](/user/174045) 谢谢qwq
by coconutt_ @ 2020-02-24 19:47:17