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LeetCode刷题系列—34. Find First and Last Position of Element in Sorted Array 1.题目描述 英文版: 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 ...
leetcode_medium_array problem 34. Find First and Last Position of Element in Sorted Array solution #1: 解题思路:分别使用二分法查找最左和最右端的元素; code 注意,最右端元素的mid值如何确定; solution #2: 解题思路:使用二分法找到元素,然后进行前后移动,找到最左最右端的元素; code solution #3: 解题...
- LeetCodeleetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/ 解题思路 1. 二分找元素,双指针找区间 class Solution { public: vector<int> searchRange(vector<int>& nums, int target) { vector<int> res(2, -1); int pos = bsearch(nums, target, 0, nums....
[Leetcode][python]Find First and Last Position of Element in Sorted Array/在排序数组中查找元素的第一个和最后一个位置 题目大意 给定一个按照升序排列的整数数组 nums,和一个目标值 target。找出给定目标值在数组中的开始位置和结束位置。 你的算法时间复杂度必须是 O(log n) 级别。
Output: [-1,-1] 也是一道典型的二分法题目,思路是通过二分法思想分别找到第一个插入的位置和第二个插入的位置。 时间O(log n) 空间O(1) /** * @param {number[]} nums * @param {number} target * @return {number[]} */ var searchRange = function(nums, target) { ...
34. Find First and Last Position of Element in Sorted Array Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value. If target is not found in the array, return [-1, -1]. ...
题目地址:https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array/description/ 题目描述 Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. ...
3. Code: 1/2 2/2 3.1. Explaination of the Code: Initialization Check: Checkif not numsto immediately return[-1, -1]if the input array is empty. Validity Check: Ensurestartandendare within the valid bounds of the array and thatnums[start]andnums[end]actually match the target value. If...
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]. ...