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What is the possible number of binary trees that can be created with 3 nodes, giving the sequence N, M, L when traversed in post-order.

(a) 15

(b) 3

(c) 5

(d) 8

The query is from Binary Trees topic in chapter Binary Trees of Data Structures & Algorithms I

The question was asked in exam.

1 Answer

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Best answer
Right option is (c) 5

The explanation is: 5 binary trees are possible and they are,

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