Problem 28471 --仙人掌28471: 仙人掌
Time Limit: 1 Sec Memory Limit: 512 MB
Submit: 4 Solved: 1
[Submit][Status][Web Board][Creator:][下载FPS0元][添加到购物车][下载测试数据0元][25230kb]Description
Input
Output
Sample Input
2
3 2
1 2
1 3
5 4
1 2
2 3
2 4
1 5
Sample Output
2
8
HINT
Source
[Submit][Status]
