输入数据
```
100 100
ababaaababbaaaababbababbbaabaaaaabaaaaabaaabbabaabbaaaabbababbaaabbabaaabbbbabbbbaaabbbabbabbabbbbbb
```
正解
```
6739545
```
我的输出
```
18109571
```
by Caim_Astraea @ 2022-07-19 21:28:22
@[intelligent_boy](/user/215915) 你不上课跑哪去了
by SUPERLWR @ 2022-07-19 21:28:33
@[lopzith](/user/215915) 你是不是没看到题目里说只要长度为奇数的回文串
by Aisaka_Taiga @ 2023-01-28 11:31:11