Given the following tree:
Which traversal method would give as result the following output: CDBEA?
The answer in my study guide is Postorder, but I think postorder would output: DEBCA. Am I wrong?
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3$\begingroup$ Which book are you referencing? "The book" does not make sense without context. $\endgroup$– Dave ClarkeCommented May 18, 2012 at 18:50
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$\begingroup$ In fact is a study guide and this is a question that's why there is no context $\endgroup$– Jorge ZapataCommented May 18, 2012 at 18:51
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$\begingroup$ This is random traversal :) what is the usage? $\endgroup$– user742Commented May 18, 2012 at 18:52
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2$\begingroup$ The question is fine (though it might be better to generalize it a little bit so it is more useful for others also), it is a normal question a CS student might ask. $\endgroup$– KavehCommented May 18, 2012 at 21:16
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1 Answer
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You are not wrong.
A postorder traversal visits the left subtree, then the right subtree, then the root of the current tree (recursively).
answered May 18, 2012 at 18:53
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$\begingroup$ perfect I just wanted to be sure, thanks $\endgroup$ Commented May 18, 2012 at 18:54
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2$\begingroup$ Unordered children could explain why C comes first, but not the position of B. $\endgroup$– RaphaelCommented May 18, 2012 at 20:27
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$\begingroup$ I can't make sense of the traversal CDBEA. Is this just random? If not, what sort of traversal is being used? $\endgroup$ Commented May 19, 2012 at 13:09