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What is the worst case time complexity of LSD radix sort?

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What is the worst case time complexity of LSD radix sort?

(a) O(nlogn)

(b) O(wn)

(c) O(n)

(d) O(n + w)

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Query is from Sorting topic in chapter Sorting of Data Structures & Algorithms II

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Best answer
Right choice is (b) O(wn)

Easiest explanation - Time complexity of LSD radix sort depends upon the word size and the number on items. It runs in O(wn) time in worst case, where n is the number of inputted elements and w is the number of digits in the largest number.

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