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样例似乎有问题啊。。在剩下的格子中，难道可以用一次失误就能判断出余下船的位置？附图

Posted by yzhw at 2009-08-02 18:18:52 on Problem 1138 
oxxxxooooo
oooooxoooo
oxooxxxo..
xxoooooo..
xoooxooo..
ooxxxxoo..
oooooxxoox
ooooooxoox
ooooooooxx
oooooooooo

这张图上已经把能确定的位置都确定了，下面还有8个各自
难道可以用一次失误就判断出
xx
xx
这个船的位置？
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