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测试数据还是弱 啊,我的程序过不了这组,但是AC了

Posted by zab08 at 2009-03-26 20:53:05 on Problem 2157 and last updated at 2009-03-26 20:53:36
4 4
SXBG
...X
cXCX
.X.b

答案:YES
我的答案:NO

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