UVA10703 Free spots

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=19&page=show_problem&problem=1644 [PDF](https://uva.onlinejudge.org/external/107/p10703.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10703/8bc53fb10d434c1474cedce3dcc1b7a012de742d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10703/a4e472db525b9df01227ebb8b07dd80c71f5fab9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10703/c17cdf4203ce9fb462861582fef9e906792bf86b.png)