@[水题淹死的鱼](/user/196899) T2好像dfs会被卡爆，用BFS
by PersistentLife @ 2020-05-27 17:04:33
@[最牛刷题者](/user/302837) dfs一分都没有？/yiw
by lndjy @ 2020-05-27 17:05:14
@[虐lxl王子](/user/348716) 我好菜啊
by lndjy @ 2020-05-27 17:06:05
我dfs照样100呀？
by 小恐 @ 2020-05-27 17:06:07
@[虐lxl王子](/user/348716) 您好强啊，满意了么
by LeavingZ @ 2020-05-27 17:06:28
@[虐lxl王子](/user/348716) 哦，名字瞩目哦
by 铁锤 @ 2020-05-27 17:06:36
@[水题淹死的鱼](/user/196899)
```string::size()```的原型是
```cpp
std :: string :: unsigned size() {}
```
所以当串长为 $1$ 的时候直接```s.size()-2``` 会死（
by namespace_std @ 2020-05-27 17:07:14
@[虐lxl王子](/user/348716) ntql
by HearTheWindSing @ 2020-05-27 17:07:19
@[namespace_std](/user/85053) emmmm，我死了
by lndjy @ 2020-05-27 17:07:52
CCF你个CCF啊
by lndjy @ 2020-05-27 17:08:11