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Question { Aricent, 39024 }

Given n nodes. Find the number of different structural
binary trees that can be formed using the nodes.


Answer

No. of labeled binary tree :

n^(n-2)

No. unlabeled binary tree :

(2n)!/[(n+1)!.n!] (this is known as catlon number)

Is This Answer Correct ?    25 Yes 12 No