自然数本来不就是非负整数吗
by ExplodingKonjac @ 2022-02-17 07:30:12
@[123ZDQ](/user/92076) <https://codeforces.com/blog/entry/62393>
by xyf007 @ 2022-02-17 08:10:24
自然数本来不就是非负整数吗
by Cerisier @ 2022-02-17 08:52:07
@[xyf007](/user/68273) 谢谢大佬Orz
by 123ZDQ @ 2022-02-18 22:45:32