UVA649 You Who?

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=590 [PDF](https://uva.onlinejudge.org/external/6/p649.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA649/1cc819539dc99f6de1d7d01be470765eb0baa8e8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA649/dbb46e64684845c7305a1d41ae9c64b979370f73.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA649/8d14015fc998db5b391ec7260e99b6995c555946.png)