Mayor's posters
题目描述
[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=17&page=show_problem&problem=1528
[PDF](https://uva.onlinejudge.org/external/105/p10587.pdf)
![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10587/cd78d581a1fc6c9ec2d9b3173f9b68a09424475e.png)
输入输出格式
输入格式
![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10587/6436da42b41ec1428b97672792b9d28ec339a310.png)
输出格式
![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10587/6242da124237600afd35badbcef3a1cefd8b37f9.png)
输入输出样例
输入样例 #1
1
5
1 4
2 6
8 10
3 4
7 10
输出样例 #1
4