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 Output: 5 Example 2:Input: [3,2,3,1,2,4,5,5,6] and k = 4 Output: 4 Note:...
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...
Given an integer arraynumsand an integerk, returnthekthlargest element in the array. Note that it is thekthlargest element in the sorted order, not thekthdistinct element. Can you solve it without sorting? Example 1: Input:nums = [3,2,1,5,6,4], k = 2Output:5 Example 2: Input:nu...
publicintfindKthLargest(int[]nums,intk){Comparator<Integer>cmp;cmp=newComparator<Integer>(){@Overridepublicintcompare(Integeri1,Integeri2){// TODO Auto-generated method stubreturni2-i1;}};// 建立最大堆Queue<Integer>q=newPriorityQueue<Integer>(cmp);for(inti=0;i<nums.length;i++){q.offer...
LeetCode 215. Kth Largest Element in an Array 原题链接在这里:https://leetcode.com/problems/kth-largest-element-in-an-array/ 题目: 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....
215. Kth Largest Element in an Array 题目大意:给定无序数组求第k大,经典面试题 题目思路:利用快速排序,每次定一个轴,比轴大的放左边,小的放右边,如果左边的数量小于k,则第k大在右边,反之在左边,每次去找就好了 时间复杂度&&空间复杂度:O(n)(需要找的总共次数为n/2+n/4+…+1 = 2n-1...
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. ...
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]andk=2,return5. Note: You may assume k is always valid, 1 ≤ k ≤ array's length. ...
https://leetcode.com/problems/kth-largest-element-in-an-array/description/ 内置排序beat 99%,重新写一下归并和快排比比试试。 自己写的归并排序,beat 40% . 快速排序由于基准点问题第一次直接 TLE. 好吧,修改一下,选取基准点的方法基本是: 1. 取左端或右端。 2. 随机取。 3. 取...
class Solution{public:intfindKthLargest(vector<int>&nums,intk){sort(nums.rbegin(),nums.rend());returnnums[k-1];}}; Algorithm to Find Kth Smallest/Largest Element in the Array by Using the Heap A Heap is a data structure that is also a tree. The heap satifies that any parent nodes...