tree[i][j]，i大于等于字符总个数，j大于等于字符种类数（也许）
by eastcloud @ 2022-07-13 20:04:44
@[Main_WF](/user/302750) 
by memset_0x3f @ 2022-07-14 14:47:35
@[eastcloud](/user/421265) 了解，谢谢大佬
by Main_WF @ 2022-07-14 15:15:27
@[memset_0x3f](/user/333478) 了解
by Main_WF @ 2022-07-14 15:15:52
@[Main_WF](/user/302750) 确定不了的话也可以直接用指针或 `vector` 来存
by OldDriverTree @ 2023-02-02 16:39:01