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网上找的代码,路过的看看吧,服了...

Posted by vortex101 at 2009-02-26 13:51:45 on Problem 2453
#include <stdio.h>
int main()
{
    int n,x;
    while(scanf("%d",&n),n)
    {
        x=n&-n;
        printf("%d\n",n+x+(n^n+x)/x/4);
    }
}

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