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0034-find-first-and-last-position-of-element-in-sorted-array.adoc

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34. Find First and Last Position of Element in Sorted Array

{leetcode}/problems/find-first-and-last-position-of-element-in-sorted-array/[LeetCode - Find First and Last Position of Element in Sorted Array^]

Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value.

Your algorithm’s runtime complexity must be in the order of O(log n).

If the target is not found in the array, return [-1, -1].

Example 1:

Input: nums = [5,7,7,8,8,10], target = 8
Output: [3,4]

Example 2:

Input: nums = [5,7,7,8,8,10], target = 6
Output: [-1,-1]

思路分析

可以直接使用二分查找,搜索两次。

link:{sourcedir}/_0034_FindFirstAndLastPositionOfElementInSortedArray.java[role=include]