L215KthLargestElementinanArray l215=newL215KthLargestElementinanArray();int[] nums = { 2, 1, 3, 4, 5};intk = 1;intnumber =l215.findKthLargest(nums, k); System.out.println(number); System.out.println("!!!");intnum2 =l215.findKthLargest2(nums, k); System.out.println(num2);...
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. 链接:http:...
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...
代码的话,分区可以采取双指针,i 前边始终存比分区点大的元素。 public int findKthLargest(int[] nums, int k) { return findKthLargestHelper(nums, 0, nums.length - 1, k); } private int findKthLargestHelper(int[] nums, int start, int end, int k) { int i = start; int pivot = nums[...
LeetCode215: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. For example, Given [3,2,1,5,6,4] and k = 2, return 5....
英文网址:215. Kth Largest Element in an Array。 中文网址:215. 数组中的第K个最大元素。 思路分析 求解关键:这是一个常规问题,使用借用快速排序的 partition 的思想完成。关键在于理解 partition 的返回值,返回值是拉通了整个数组的索引值,这一点是非常重要的,不要把问题想得复杂了。
一、问题描述 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:
classSolution:deffindKthLargest(self,nums,k):""" :type nums: List[int] :type k: int :rtype: int """returnself.findKthSmallest(nums,len(nums)+1-k)deffindKthSmallest(self,nums,k):# if len(nums) == 1:# return nums[0]pivot=self.partition(nums,0,len(nums)-1)ifk>pivot+1:return...
for i in range(k, len(nums)):# sinve we are trying to keep the k-largest numbers in the heap# we will add any incoming element that is the larger than the min# of the heap. Because our goal is to have as many large elements# in the heap...
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...