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2582: 仙人掌

Memory Limit：512 MB Time Limit：1.000 S
Judge Style：Text Compare Creator：
Submit：2 Solved：2
SubmitSubmit RecordStatisticsWeb BoardShowOff!

Description

Sample Input Copy 

2
3 2
1 2
1 3
5 4
1 2
2 3
2 4
1 5

Sample Output Copy 

2
8

HINT

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