Algorithms | Greedy Algorithms | Question 3

What is the time complexity of Huffman Coding?
(A) O(N)
(B) O(NlogN)
(C) O(N(logN)^2)
(D) O(N^2)

Answer: (B)

Explanation: O(nlogn) where n is the number of unique characters. If there are n nodes, extractMin() is called 2*(n – 1) times. extractMin() takes O(logn) time as it calles minHeapify(). So, overall complexity is O(nlogn).
See here for more details of the algorithm.

Quiz of this Question

GATE CS Corner    Company Wise Coding Practice

Recommended Posts:

0 Average Difficulty : 0/5.0
No votes yet.