@[_yjh](/user/222104)
+ 此题要开 `long long`;
+ `cin`巨慢,建议换成`scanf`。
by Nuclear_Pasta @ 2023-05-13 20:43:48
@[departure2020](/user/609565) thx,但是我去年已经把这题补掉了/bx
by _yjh @ 2023-05-15 14:20:26