UVA12950 Even Obsession

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4829 [PDF](https://uva.onlinejudge.org/external/129/p12950.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12950/0172e71d8248c36b0b6ace269143eaa1ccdb1df9.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12950/cd8ea72272bf03157e085a6570cb8546b92010c2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12950/a2ff69d227c7b81a0ad1ed84e2479b96a2ee3d27.png)