该题数据已加强,题解中 O(N2)O(N^2)O(N2) 的应该撤下。
https://www.luogu.com.cn/blog/hf45LLR/solution-p5094
https://www.luogu.com.cn/blog/lc-2018-Canton/solution-p5094
https://www.luogu.com.cn/blog/zhaoshuaiqi/solution-p5094