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Re:这题用位操作真的是秒过，不过要注意移位时操作符的优先级（每个移位最好加个括号）

Posted by 0810311106 at 2010-01-07 12:11:49 on Problem 3748 and last updated at 2010-01-07 12:22:25
In Reply To:这题出的真叫。。。~~ Posted by:0912080007 at 2010-01-07 10:24:38 
同意，完全的位操作不用考虑特殊情况，不过一直错在这个优先级上，提交n次都错，加了括号就过了。
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