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Re:发个证明，嘿嘿。

Posted by fightACMer at 2007-05-26 15:17:26 on Problem 1953
In Reply To:发个证明，嘿嘿。 Posted by:11119999 at 2006-08-12 15:58:11 
> Proof:
> 
> Suppose a is the string.
> 
> if a[n]=0;
> then a[n]=a[n-1];
> 
> if a[n]=1;
> then a[n-1] must be 0;
> so a[n]=a[n-2];
> 
> 'Cause a[n]=0 or a[n]=1;
> so a[n]=a[n-1]+a[n-2];
> 
>
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