UVA10045 Echo

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=12&page=show_problem&problem=986 [PDF](https://uva.onlinejudge.org/external/100/p10045.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10045/75fd1bace07bb15caabf6ec66732072ffe79eea4.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10045/abdbc64453bf3afa493430b5f4cb2430e434d571.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10045/5a26a5c2769f442655cc97cbede9be390447125d.png)