Solution: Find First and Last Position of Element in Sorted Array
Explore how to apply a modified binary search to locate the first and last indices of a target value in a sorted array. Learn to implement an algorithm that efficiently finds boundaries with O(log n) runtime, handles edge cases, and returns accurate positions or [-1, -1] if the target is absent.
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Statement
You are given an integer array, nums, that is sorted in non-decreasing order. Your task is to find the first and last indexes of a given value, target, within this array.
If the target does not appear in the array at all, return [-1, -1].
Note: You must write an algorithm with
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