> 样例$\color{Green}\Large{\text{过了}}$ ✔
> 样例$\color{Red}\Large{\text{似乎}}$都过了 ✘
by JackMerryYoung @ 2022-05-01 16:57:07
额，我好像确实过了
by SHENTONG_ZY @ 2022-05-01 17:02:04
@[SHENTONG_ZY](/user/427590) if l>r swap(l,r)
by 黑影洞人 @ 2022-05-01 17:28:13
@[SHENTONG_ZY](/user/427590) 似乎不影响
by 黑影洞人 @ 2022-05-01 17:29:05