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Leetcode上的这题来详细总结下这个问题的...
classSolution:#@param k & A a integer and an array#@return ans a integerdefkthLargestElement(self, k, A):iflen(A) <k:returnNone start=0 end= len(A) - 1index=self.partition(A, start, end)whileindex != k-1:ifindex > k-1:end= index - 1#res处的元素本身确实不合格,可以去除减...
leetcode.com/problems/kth-largest-element-in-an-array/ class Solution { public: int findKthLargest(vector<int>& nums, int k) { // 只需要维护一个元素个数为k的小顶堆。一次遍历以后,这个堆里面存储着数组里面最大的k个数, // 那么小顶堆的堆顶元素,就是第k大的元素。 int N=nums.size...
/* * @lc app=leetcode id=215 lang=cpp * * [215] Kth Largest Element in an Array */ // @lc code=start class Solution { public: int findKthLargest(vector<int>& nums, int k) { const auto partition = [&](int l, int r) { const int ind = rand() % (r - l + 1) + l...
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。 AI检测代码解析 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...
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: AI检测代码解析 Input:[3,2,1,5,6,4]and k = 2...
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. ...
冒泡排序两两比较,把最大的放在最后,然后次大的放倒数第二,依次执行。。。 2.选择排序从list中比较所有的选择最大的和最后一个元素交换,重复此动作。 快速排序每次选最右边为...
summary: "Given an integer array nums and an integer k, return the kth largest element in the array." ---## Introduction Given an integer array `nums` and an integer `k`, return the `k-th` largest element in the array. Note that it is the `k-th` largest element in the sorted ...
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...