UVA12468 Zapping

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3912 [PDF](https://uva.onlinejudge.org/external/124/p12468.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12468/162e4f6f6661d0a73dee9a48c4f161e243957967.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12468/14b89767cd99d3ecb91dd085b6f42ecfdddb574e.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12468/f3b54a69509c8e9477cd349588f48a26aed29ad4.png)