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integral values are demanded

Posted by frkstyc at 2007-04-01 14:36:26 on Problem 3214
In Reply To:can i modify some key into non-integer values? Posted by:ahyangyi at 2007-04-01 14:34:46 
> for example,
>     7
>    / \
>   4   5
>  / \ / \
> 3  4 2 5
> 
> in this case, if I can modify the 2 into something like "4.5", the answer will be 1, otherwise I'll have to modify at least 3 keys.
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