A Simple Solution is to sort the given array using a O(n log n) sorting algorithm like Merge Sort,Heap Sort, etc and return the element at index k-1 in the sorted array. Time Complexity of this solution is O(n log n). Java Arrays.sort() 1publicclassSolution{2publicintfindKthSmalle...
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 e...
题目地址:https://leetcode.com/problems/kth-smallest-element-in-a-bst/#/description 题目描述 Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST’s total ...
intk =0; publicintkthSmallest(TreeNode root,intk) { this.k = k; inorderTraversal(root); returnres; } publicList<Integer> inorderTraversal(TreeNode root) { List<Integer> list =newArrayList<Integer>(); if(root ==null) returnlist; if(root.left !=null&& list.size() < k) list.addAl...
Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: ...
Kth Smallest Element in a BST 题目内容 https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst/ 给定一个二叉搜索树,编写一个函数 kthSmallest 来查找其中第 k 个最小的元素。 说明: 你可以假设 k 总是有效的,1 ≤ k ≤ 二叉搜索树元素个数。 题目思路 记住,二叉搜索树可以通过中序遍历...
class Solution { public int kthSmallest(int[][] matrix, int k) { //获取 二维数组的最小值和最大值 int smallest = matrix[0][0]; int largest = matrix[matrix.length-1][matrix[0].length-1]; //step1: 二分法 while (smallest < largest) { int medVal = smallest + (largest - smallest...
总体上,我们只需要增加两个变量num和res。num记录中序遍历已经输出的元素个数,当num == k的时候,我们只需要将当前元素保存到res中,然后返回即可。 下边分享下三种遍历方式的解法,供参考。 递归法。 intnum=0;intres;publicintkthSmallest(TreeNoderoot,intk){inorderTraversal(root,k);returnres;}privatevoidin...
class Solution{public:intfindKthLargest(vector<int>&nums,intk){nth_element(nums.begin(),nums.end()-k,nums.end());returnnums[nums.size()-k];}}; Partition the Array to Find the Kth Largest/Smallest Element The following is essentially similar to the nth_element algorithm. Each iteration,...
Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: ...