Problem2413--AIO2012seniorP1 - Posters

2413: AIO2012seniorP1 - Posters

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Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 4Submit Num: 8Statistics

Description



Sample Input Copy 

4
1 5
3 7
2 6
8 9

Sample Output Copy 

3

HINT

Source/Category

AIO 
Submit