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# 将pivot放到正确的位置上nums[p],nums[r]=nums[r],nums[p]# 如果p...
代码如下: importheapqclassSolution(object):deffindKthLargest(self, nums, k): min_heap = nums[:k] heapq.heapify(min_heap)# create a min-heap whose size is kfornuminnums[k:]:ifnum > min_heap [0]: heapq.heapreplace(min_heap , num)# or use:# heapq.heappushpop(min_heap, num)retu...
packagemedium;importjava.util.Arrays;importjava.util.PriorityQueue;publicclassL215KthLargestElementinanArray {publicintfindKthLargest(int[] nums,intk) { Arrays.sort(nums);intlen =nums.length;returnnums[len -k]; }publicintfindKthLargest2(int[] nums,intk) { PriorityQueue<Integer> minHeap =newPri...
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. 这道题就是一道简单的堆排序的问题。 注意学习堆排序。 代码如下: /* * 考查的是堆...
https://leetcode.com/problems/kth-largest-element-in-an-array/ 题目: 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] ...
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. ...
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:
Leetcode 215 Kth Largest Element in an Array 数组中第K大的数 堆 声明最大堆 std::priority_queue<int> big_heap; (默认是最大堆) std::priority_queue<int,std::vector<int>,std::greater<int> > small_heap; //声明最小堆 std::priority_queue<int,std::vector<int>,std::less<int> > big...
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数组中的第K个最大元素 Kth Largest Element in an Array(C++) 目录 题目描述 题目大意 排序后取下标 复杂度分析 利用快排思想O(n)查找第K大元素 复杂度分析 题目来源:https://leetcode-cn.com/problems/kth-largest-element-in-an-array/ 题目描述 在未排序的数组中找到第 k 个最大的元素。请注意,你...