问题不一样好吧
by scp020 @ 2022-10-02 13:00:13
@[Stephen_Curry_II](/user/516468) 1880是个环，而本题不是
by Etinorally @ 2022-10-02 13:00:19
拜托，这题是链
by Kowenxrz @ 2022-10-02 13:03:18
啊……过了，谢谢
by _Give_up_ @ 2022-10-02 13:03:36