UVA11961 DNA

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3112 [PDF](https://uva.onlinejudge.org/external/119/p11961.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11961/7c3e335ce565756efc45aaaeb9df46f3de305e2e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11961/1f4a2ee7cafa0b363894c6f2739da7bc2037302e.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11961/426139ba9ae1d2f94116a2f1af87e5224a51ebb7.png)