UVA12538 自带版本控制功能的IDE Version Controlled IDE

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3983 [PDF](https://uva.onlinejudge.org/external/125/p12538.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12538/4c14b478bcf5bf540f660e2f00bd416d2e90782d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12538/5b96551d42583821b740ede529e557e64d8ad636.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12538/339975a5be9b6b39c02547a7d55daf9a335c0a75.png)