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wa的注意了，如果前面数据都过了，看看这组

Posted by 42292624 at 2010-03-23 15:04:40 on Problem 3009 
20 20
0 1 0 0 0 0 1 0 1 0 0 1 0 2 0 1 0 1 0 0
1 0 0 1 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 1
0 0 1 0 1 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0
0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 0 0 1
0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 1 1 0 0 1
0 0 0 0 0 0 1 0 0 1 1 0 0 1 0 1 0 0 0 1
1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 1
1 1 0 0 0 0 0 1 0 0 0 0 0 0 3 0 1 0 0 0
0 0 1 1 0 0 1 0 1 1 0 0 0 0 0 1 0 1 1 0
1 1 0 1 1 0 0 1 0 0 0 0 1 0 0 0 1 1 0 0
0 0 0 1 1 1 0 0 0 0 0 0 1 1 1 0 0 1 0 0
1 0 1 0 0 1 0 1 0 1 0 1 0 0 0 1 0 1 0 0
0 1 1 0 0 0 1 0 0 1 0 1 1 1 0 1 0 1 0 0
0 1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 1 1 0 1
1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0
0 0 1 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 1 0 1 0 1 1 0 1 1 0 1 1 1
1 1 0 0 0 1 0 0 1 0 1 0 1 0 1 0 0 0 0 1
0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 0 0 0 1
1 0 1 1 1 0 0 0 0 1 0 1 0 0 0 0 1 1 0 1
结果是5
看看3的位置就知道了
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