jiuguaiwf @ 2018-08-31 12:31:43
或许像我一样，把int全改long long就过了，玄学...
by Happynewyear @ 2018-08-31 12:44:22
by Diogenes @ 2018-09-03 21:19:28
dalao 的玄学不适合我，我仍然WA着……
by Diogenes @ 2018-09-07 19:34:04
然后发现第九个点是n=2左右的特殊边界情况