UVA12952 Tri-du

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4831 [PDF](https://uva.onlinejudge.org/external/129/p12952.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12952/a44afbb59ef0a4f1135c0c64eef65332323d91fb.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12952/fb613ed84da4ad66ed01913864aa3b0035efc75c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12952/0386eae021905288c4a2eebc9612b4b1d37d4973.png)