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How do you shuffle a binary tree without using any external data structures.

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How do you shuffle a binary tree without using any external data structures.
Note: With equal probability to every node.

posted Sep 11, 2014 by Atiqur Rahman

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Can I use an array???
commented Sep 12, 2014 by Salil Agrawal
Suppose array is allowed then we can create an array out of the binary tree (delete node when you take out an element) so at the end u have an array and null tree. Now choose random element from the array and insert into the tree till end. Please comment if looking something different.
commented Sep 12, 2014 by Salil Agrawal
No extra space is allowed and the structure of the BT should not change... sorry for late comment!
commented Sep 13, 2014 by Atiqur Rahman
I give up :) no clue at all
commented Sep 13, 2014 by Salil Agrawal
You can answer for the larger audience reach :)
commented Sep 13, 2014 by Salil Agrawal

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