%%%
by Inkyo @ 2019-10-30 16:27:22
$ qndmx $
by ⚡小林孑⚡ @ 2019-10-30 16:27:45
@[Inkyo墨攸](/space/show?uid=266011) 帮忙看一下吧 =.=
by Meatherm @ 2019-10-30 16:27:56
萌 新 刷 蓝 题 ？
by KazamiHina @ 2019-10-30 16:28:16
另外附上我挂掉的数据：
Input：
```
10 4
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
1
aaaaa
```
Output：
```
196
```
Answer：
```
193
```
by Meatherm @ 2019-10-30 16:30:06
~~这么难的题我不会啊~~
等下我好像真不会qaq
by Inkyo @ 2019-10-30 16:30:48
%%%
by 行者_Walker @ 2019-10-30 16:30:52
好像是个区间$dp$ - -
by Inkyo @ 2019-10-30 16:32:39
不太会的亚子
by Inkyo @ 2019-10-30 16:32:52