题面修缮+疑惑

P2477 [SCOI2008] 套圈【错题已隐藏】

@[小粉兔](/user/10703)
by Catcats @ 2022-09-03 09:50:30


@[小粉兔](/user/10703)
by NOI_AK_dreeeam @ 2022-09-03 09:56:06


@[小粉兔](/user/10703)
by songtj @ 2022-09-03 09:57:51


@[chen_zhe](/user/8457)
by Catcats @ 2022-09-03 10:35:14


@[chen_zhe](/user/8457) @[小粉兔](/user/10703)
by Catcats @ 2022-09-03 16:19:43


@[Catcats](/user/658875) 不允许改变原题目语句,只能修格式
by 小粉兔 @ 2022-09-04 03:54:06


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