https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix/ 题目: n x n Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: matrix = [ [ 1, 5, 9], [10, 11, 13], [12, 13, 15] ], k = 8, return 13. Note: You...
classSolution {public:intkthSmallest(TreeNode* root,intk) {returnkthSmallestDFS(root, k); }intkthSmallestDFS(TreeNode* root,int&k) {if(!root)return-1;intval = kthSmallestDFS(root->left, k);if(k ==0)returnval;if(--k ==0)returnroot->val;returnkthSmallestDFS(root->right, k); } ...
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: image.png k = 8, return 13. Note: You may assu...
代码如下: 1/**2* Definition for a binary tree node.3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12intkthSmallest(TreeNode* root,intk) {13stack<TreeNode *>...
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 ...
链接:https://leetcode-cn.com/problems/kth-smallest-element-in-a-sorted-matrix 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 思路 思路一 使用堆,维护一个最大堆,限定堆中的元素个数为 k ,将所有的元素依次压入堆中,当堆中元素大于 k 时,pop 出最大的元素。堆中最后一个元素...
Leetcode 230. Kth Smallest Element in a BST 简介:先来看下二叉搜索树的性质,对于任意一个非叶子节点,它的左子树中所有的值必定小于这个节点的val,右子树中所有的值必定大于或等于当前节点的val。 这条性质就保证了如果我们对二叉搜索树做中序遍历,中序遍历的结果肯定是有序的。对于此题而言,我们只需要拿到...
*/publicclassSolution{publicintkthSmallest(TreeNoderoot,intk){if(root==null){return-1;}TreeNodecurr=root;while(curr!=null){intleft=count(curr.left);if(left<k-1){k=k-left-1;curr=curr.right;}elseif(left>k-1){curr=curr.left;}else{returncurr.val;}}return-1;}privateintcount(TreeNode...
Given a n x n matrix where each of the rows and columns are sorted inascending order, find the kth smallest element in the matrix. Note that it is ...
Leetcode.230-Kth-Smallest-Element-In-A-Bst二叉搜索树中第K小的元素 使用中序遍历 /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ class Solution { int i = 0; public ...