What is the running time of an insertion sort algorithm if the input is pre-sorted?(a) O(N^2)(b) O(N log N)(c) O(N)(d) O(M log N)This question was addressed to me in quiz.This interesting question is from Insertion sort in portion Sorting of Data Structures & Algorithms II

What is the running time of an insertion sort algorithm if the input i

1.	What is the running time of an insertion sort algorithm if the input is pre-sorted?(a) O(N^2)(b) O(N log N)(c) O(N)(d) O(M log N)This question was addressed to me in quiz.This interesting question is from Insertion sort in portion Sorting of Data Structures & Algorithms II
Answer» The correct choice is (c) O(N) Easy explanation - If the INPUT is pre-sorted, the running time is O(N), because the test in the inner for loop ALWAYS fails immediately and the ALGORITHM will RUN QUICKLY.

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What is the running time of an insertion sort algorithm if the input is pre-sorted?(a) O(N^2)(b) O(N log N)(c) O(N)(d) O(M log N)This question was addressed to me in quiz.This interesting question is from Insertion sort in portion Sorting of Data Structures & Algorithms II

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