UVA12574 VOID

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=4019 [PDF](https://uva.onlinejudge.org/external/125/p12574.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12574/5b1844d97dbc629dcc0fd8d1187f2cebf09a8934.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12574/f01b5b29662ea0830390d1d122eb280d89a58702.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12574/d439ea2de816477688ed8ca054a95fade943fa70.png)