UVA623 500!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=564 [PDF](https://uva.onlinejudge.org/external/6/p623.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA623/5abfb0f5b95fac98bb1e93bb35b1859edcb9341b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA623/aa382a4f6cb01764327356e48ac838c7584af77d.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA623/0327a12361b0b32baca20b229445402044a8c05f.png)