UVA12840 The Archery Puzzle

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=861&page=show_problem&problem=4705 [PDF](https://uva.onlinejudge.org/external/128/p12840.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12840/e1dbfae66d3baff6c82285409d8fa11efe023826.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12840/203bda0a60ba4cd8ea23fb8edb114b1afecf16b9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12840/14331f369c2964cde98491083f82ddfbb034b7e1.png)