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",...
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,...
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:matrix...
Leetcode 230 Kth Smallest Element in a BST 思路 由于bst的中序遍历可以得到一个升序的序列,因此对bst进行中序遍历并记录已经遍历过的数字,当遍历过count==k-1时(count初始为0),说明现在正在遍历的是第k小的数字,保存起来等到最后返回即可。 小技巧 需要注意的是在java的值传递方式,将count和result放到数组...
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. ...
题目描述: LeetCode 378. Kth Smallest Element in a Sorted Matrix 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 or
根据给的matrix的性质,可以知道最小的element一定是在左上角的,接下来小的值是在这个值的右边还是在这个值的下面没有办法确定,这里维护的是一个size为k的minHeap,通过传统的BFS做法,不停地把当前值的下面的和左边的传入minHeap,因为minHeap会自动的把最小值放到最上面,所以poll k次就可以知道第k小的。这里用到...
leetcode 230 二叉搜索树中第K小的元素 kth-smallest-element-in-a-bst【ct】 === 思路:
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...
# 215 Kth Largest Element in an Array 题目来源: https://leetcode.com/problems/kth-largest-element-in-an-array/description/ 题意分析: 在一个无序链表中找出第k大的元素。 Example 1: Input: [3,2,1,5,6,4] and k = 2 Output: 5 LeetCode215——数组中的第K个最大元素 /kth-largest-ele...