UVA928 Eternal Truths

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=11&page=show_problem&problem=869 [PDF](https://uva.onlinejudge.org/external/9/p928.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA928/3acd0ecd12b56039b8683362ac050e95b4e7320c.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA928/874edb434c2f77849313cf687be6a2f90b6df631.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA928/fd1600bae9308590e5fbf66f5513851c82c5538b.png)