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这题真难啊，付几组数据

Posted by zsasuke at 2010-03-11 23:37:24 on Problem 2891 
2
86 2
88 0

-----------88


4
23422 2421
2144 123
2421 11
231 23
-------------- -1



3
16 2
65 3
999 13
---------------------
914098
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