};classSolution {public:intkthSmallest(vector<vector<int> >& matrix,intk) {intlen=matrix.size();boolinheap[1000][1000]; memset(inheap,0,sizeof(inheap)); priority_queue<Node>heap; heap.push(Node(0,0,matrix[0][0]));for(inti=0; i<k-1; i++) { Node now=heap.top();if(now....
Heap: you need to know the row number and column number of that element(so we can create a tuple class here) 1publicclassSolution {2publicintkthSmallest(int[][] matrix,intk) {3Comparator<Tuple> comp =newComparator<Tuple>() {4publicintcompare(Tuple tp1, Tuple tp2) {5returntp1.val -t...
DescriptionGiven 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 …
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...
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...
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
packageleetcodeimport("container/heap")// 解法一 二分搜索funckthSmallest378(matrix[][]int,kint)int{m,n,low:=len(matrix),len(matrix[0]),matrix[0][0]high:=matrix[m-1][n-1]+1forlow<high{mid:=low+(high-low)>>1// 如果 count 比 k 小,在大值的那一半继续二分搜索ifcounterKthSmall...
Can you solve this real interview question? Kth Smallest Instructions - Bob is standing at cell (0, 0), and he wants to reach destination: (row, column). He can only travel right and down. You are going to help Bob by providing instructions for him to re
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...
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...