Search in Rotated Sorted Array (LeetCode 33) | FREE DSA Course in JAVA | Lecture 55
Автор: TAP ACADEMY
Загружено: 2023-01-24
Просмотров: 13371
This question has been asked in dream companies like Google, and Amazon and is a Leetcode problem number 33.
The question reads - There is an integer array nums sorted in ascending order (with distinct values).
Before being passed to your function, nums may be rotated at an unknown pivot index k. For example, (0,1,2,4,5,6,7) might be turned at pivot index 3 and become (4,5,6,7,0,1,2). You have to find the index of a given target value. if the target value is not present return -1.
You must write an algorithm with O(log n) runtime complexity.
Now if a search has to be done on an array in log n complexity, the only way you can do it, is by making a Binary search.
But the trick is that it is not entirely sorted after the rotation and hence we need to follow a different approach.
Let's see how we can solve this search in the rotated array problem in java.
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