Nearly every one have used the Multiplication Table. But could you find out the k-th smallest number quickly from the multiplication table? Given the height m and the length n of a m * n Multiplication Table, and a positive integer k, you need to ret…

题目:https://leetcode.com/problems/kth-smallest-number-in-multiplication-table/description/ 668. Kth Smallest Number in Multiplication Table Nearly every one have used the Multiplication Table. But could you find out the k-th smallest number quickly fr…

Nearly every one have used the Multiplication Table. But could you find out the k-th smallest number quickly from the multiplication table? Given the height m and the length n of a m * n Multiplication Table, and a positive integer k, you need to ret…

LeetCode:乘法表中的第K小的数[668] 题目描述 几乎每一个人都用 乘法表.但是你能在乘法表中快速找到第k小的数字吗? 给定高度m .宽度n 的一张 m * n的乘法表,以及正整数k,你需要返回表中第k 小的数字. 例 1: 输入: m = 3, n = 3, k = 5 输出: 3 解释: 乘法表: 1 2 3 2 4 6 3 6 9 第5小的数字是 3 (1, 2, 2, 3, 3). 例 2: 输入: m = 2, n = 3, k = 6 输出: 6 解释: 乘法表: 1 2…

Nearly every one have used the Multiplication Table. But could you find out the k-th smallest number quickly from the multiplication table? Given the height m and the length n of a m * nMultiplication Table, and a positive integer k, you need to retu…

题目如下: 解题思路:几乎和[leetcode]719. Find K-th Smallest Pair Distance 的方法一样.只不过一个是减法一个是乘法,还有一点区别是[leetcode]719. Find K-th Smallest Pair Distance中i-j和j-i只算一个元素,而本题中i*j与j*i算两个元素. 代码如下: class Solution(object): def findKthNumber(self, m, n, k): """ :ty…

［抄题］: 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 elements. Example 1: Input: root = [3,1,4,null,2], k = 1 3 / \ 1 4 \   2 Output: 1 Exam…

Find the kth smallest number in at row and column sorted matrix. Have you met this question in a real interview? Yes Example Given k = 4 and a matrix: [ [1 ,5 ,7], [3 ,7 ,8], [4 ,8 ,9], ] return 5 Challenge O(k log n), n is the maximal number in widt…

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. 注意:你可以假设k总是有效的,1≤ k ≤二叉搜索树元素个数. 进阶:如果经常修改二叉搜索树(插入/删除操作)并且你需要频繁地找到第k小值呢? 你将如何优化kthSmallest函数? 详见:https://leetcode.com/problems/kth-smallest-element-in-a-bst/description/ Java实现: /** * Definition for a binary t…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode-cn.com/contest/biweekly-contest-24/problems/the-k-th-lexicographical-string-of-all-happy-strings-of-length-n/ 题目描述 一个 「开心字符串」定义为: 仅包含小写字母 ['a', 'b',…