classSolution:defsearchRange(self,nums,target):""":type nums:List[int]:type target:int:rtype:List[int]""" length=len(nums)iflength==0:return[-1,-1]ifnums[0]<=target and nums[-1]>=target:left,right=0,length-1whileleft<=right:mid=(left+right)// 2ifnums[mid]==target:right=left...
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 ...
34. Find First and Last Position of Element in Sorted Array 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。 如果数组中不存在目标值,返回 [-1, -1]。 示例1: 输入: nums = [5,7,7,8,8,10...
first,last=mid,midwhilel <=first: fm= (first+l) // 2ifnums[fm] <target: l= fm + 1else: first= fm -1whiler >=last: rm= (last+r) // 2ifnums[rm] >target: r= rm - 1else: last= rm + 1return[first+1,last-1]return[-1,-1]...
LeetCode-Find First and Last Position of Element in Sorted Array,LeetCodeJavaC++FindFirstandLastPositionofElementinSortedArray
- 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....
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. ...
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]. ...
思路2 时间复制度O(logn) 对于排序问题优先考虑到二分查找. intrangeSearch(vector<int>&nums,intl,intr,inttarget,boolisLeftSearch){intmid;while(l<=r){mid=(l+r)/2;inttmp=nums[mid];if(tmp==target){if(isLeftSearch){r=mid-1;}else{l=mid+1;}}else{if(isLeftSearch){l=mid+1;}else{r=...
34.Find First and Last Position of Element in Sorted Array在排序数组中寻找元素的第一和最后一个位置, 视频播放量 342、弹幕量 0、点赞数 14、投硬币枚数 5、收藏人数 5、转发人数 1, 视频作者 图灵星球TuringPlanet, 作者简介 编程爱好者的栖息地「turingplanet.org」