KthLargest(int k, int[] nums)Initializes the object with the integerkand the stream of test scoresnums. int add(int val)Adds a new test scorevalto the stream and returns the element representing thekthlargest element in the pool of test scores so far. Example 1: Input: ["KthLargest",...
215. Kth Largest Element in an Array 方法1:quick-sort 方法2: 方法3: 易错点: YRB: https://www.cnblogs.com...快排的思想,取一个pivot,排序结束一遍pivot的位置就是它的order statistic。如果pivot的pos是k-1,可以直接返回pivot;如果pos>k - 1, 说明kth 215 Kth Largest Element in an Array # ...
Leetcode-215. Kth Largest Element in an Array(快排) 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,...
演示代码: fromtypingimportListimportrandomdeffindKthLargest(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]p+=1...
[Leetcode]215. Kth Largest Element in an Array 这是Leetcode第215题,求无序数组第K大的数。 求第K大/小的数也是一个经典的问题了,一般来说有两种方法:堆思想和快排思想。其时间复杂度分别达到O(NlogK)O(NlogK)和O(N)O(N)。我们先分析这两种算法,然后分析一个优化算法。
1.问题描述 给定整数数组 nums 和整数 k,请返回数组中第 k 个最大的元素。 请注意,你需要找的是数组排序后的第 k 个最大的元素,而不是第 k 个不同的元素。 2.测试用例 示例 1 输入: [3,2,1,5,6,4] 和 k = 2 输出: 5 示例 2 输入: [3,2,3,1,2,4
你的 KthLargest 类需要一个同时接收整数 k 和整数数组nums 的构造器,它包含数据流中的初始元素。每次调用 KthLargest.add,返回当前数据流中第K大的元素。...703. Kth Largest Element in a Stream Design a class to find the kth largest element in a stream. Note that it is the kth largest element...
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 ...
class KthLargestElementQuickSelect { static Random random = new Random(); public int findKthLargest3(int[] nums, int k) { int len = nums.length; return select(nums, 0, len - 1, len - k); } private int select(int[] nums, int left, int right, int k) { ...
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....