How many nodes does a leftist tree with r nodes must have?(a) 2^r(b) 2^r-1(c) 2r(d) 2r-1My doubt is from Heap in section Heap of Data Structures & Algorithms II got this question in an interview.

How many nodes does a leftist tree with r nodes must have?(a) 2^r(b) 2

1.	How many nodes does a leftist tree with r nodes must have?(a) 2^r(b) 2^r-1(c) 2r(d) 2r-1My doubt is from Heap in section Heap of Data Structures & Algorithms II got this question in an interview.
Answer» Correct answer is (B) 2^r-1 The best explanation: A leftist tree with r NODES on the RIGHT path is proved to have at least 2^r-1 nodes. This theorem is proved by induction.

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