UVA12553 Countdown

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3998 [PDF](https://uva.onlinejudge.org/external/125/p12553.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12553/efc76b219d78f06f27501907ca8c40622bef4fd5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12553/05d2fe0524e1fec6858baed23f3778530ee363fa.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12553/cef9665ad7202d68d9eff127c78dc8d1c6c769df.png)