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贴组数据……答案是2……虽然偶用ac的程序跑出来是1……~~~~(>_<)~~~~

Posted by rayafjyblue at 2011-06-15 20:11:35 on Problem 1947
20 15
19 18
8 20
1 20
11 18
4 9
7 4
5 14
11 5
15 5
3 6
12 14
2 13
4 8
3 18
4 15
2 11
19 16
17 8
16 10

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