Question
A complete binary tree has 127 nodes. What is its height
(assuming the root is at level 0)?Solution
For a complete binary tree, the number of nodes N = 2^(h+1) - 1, where h is the height. 127 = 2^(h+1) - 1 128 = 2^(h+1) 2^7 = 2^(h+1) 7 = h+1 h = 6
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