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((__int64)1) << 31 这样就没有问题了

Posted by scat at 2008-08-01 22:09:53 on Problem 2115
In Reply To:Re:给一直WA的战友,在算2^k次方的时候不要用移位,当k=31的时候移位发生错误(保证我用的是64位移动的) Posted by:Mcfaddan_b at 2008-04-07 17:06:40 
> 顶。。。还以为用移位要高级一点，没想到方便的也是有bug的。。。
> 这个教训告诉我们：不能太懒。。
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