fromtypingimportListimportrandomclassSolution:deffindKthLargest(self,nums:List[int],k:int)->int:# 将问题转化为寻找第n-k个最小元素k=len(nums)-kdefquickSelect(l,r):pivot,p=nums[r],l# 将小于等于pivot的元素移动到左侧foriinrange(l,r):ifnums[i]<=pivot:nums[p],nums[i]=nums[i],nums[p...
636.Kth Largest Element in an Array 1.Problem Find thekth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. 题意很简单,找到一个一维数组中的第K大的数并返回。数组中第K大的数也是面试中经常考察的问题。现在就借L...
You may assume k is always valid, 1 ≤ k ≤ array's length. 寻找一个数组中第k大的数。 1、建立一个大小为k的数组,每次维护这个数组,属于暴力做法。 publicclassSolution {publicintfindKthLargest(int[] nums,intk) {intlen =nums.length;int[] result =newint[k];for(inti = 0; i < k ; ...
LeetCode 215. Kth Largest Element in an Array(排序) 题目 题意:找到一个数组里第K大的数字。 题解:我们当然可以排序好了,之后,选择第K大的数字。但是这样做一点技术含量也没有。 排序算法选用快排。寻找第K大的数字,不必把数组完全排完序之后,再找第K大。快排中是选取一个数字,把大于它的放...
Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. Example 1: [3,2,1,5,6,4] Example 2: [3,2,3,1,2,4,5,5,6] Note: You may assume k is always valid, 1 ≤ k ≤ array's length....
Leetcode 215. Kth Largest Element in an Array Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. Example 1: Input: [3,2,1,5,6,4] and k = 2...
LeetCode 0215. Kth Largest Element in an Array数组中的第K个最大元素【Medium】【Python】【快排】【堆】 Problem LeetCode Find thekth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. ...
Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For example, Given [3,2,1,5,6,4] and k = 2, return 5. Note: You may assume k is always valid, 1 ≤ k ≤ array's length. ...
/** * A Java program to find the second-largest number in an array * by iterating over an array using a for loop. * * @author coderolls.com */publicclassSecondLargestElementInArray{publicstaticvoidmain(String[]args){int[]arr={2,5,9,8,11,18,13};intsecondLargest=getSecondLargest(arr...
Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For e...