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三个符号说明三个问题。

Posted by 11119999 at 2006-08-19 17:13:04 on Problem 1029 
‘＝’说明，所有被称的都是真的。
 '>' 或者'<'说明假的就在这些里面，其他的都是真的。
最后要是一个未知其余为真，或者有一个假的，那么就OK了。否则就没戏。
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