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Re:may be useful

Posted by dog0883 at 2008-12-18 22:23:32 on Problem 2453
In Reply To:may be useful Posted by:tanghaibao at 2008-12-07 02:20:55
谢谢

> for (k=0; c; k++) c^=c&-c;
> 
> gives the number (k) of bits set in integer c

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