ARTS #56 Algorithm 本周选择的算法题是：字符串的排列 规则如下： 输入一个字符串，打印出该字符串中字符的所有排列。 你可以以任意顺序返回这个字符串数组，但里面不能有重复元素。 示例: 输入：s = "abc" 输出：["abc","acb","bac","bca","cab","cba"] 限制： 1 <= s 的长度 <= 8 Solution Runt...
ARTS #55 Algorithm 本周选择的算法题是：Construct Binary Tree from Preorder and Inorder Traversal 规则如下： Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicat...
ARTS #54 Algorithm 本周选择的算法题是：Climbing Stairs 规则如下： You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cli...
ARTS #53 Algorithm 本周选择的算法题是：Best Time to Buy and Sell Stock II 规则如下： Say you have an array prices for which the ith element is the price of a given stock on day i. Design an algorithm to find the maxim...
ARTS #52 Algorithm 本周选择的算法题是：Search a 2D Matrix II 规则如下： Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are ...
ARTS #51 Algorithm 本周选择的算法题是：Maximum Number of Occurrences of a Substring 规则如下： Given a string s, return the maximum number of ocurrences of any substring under the following rules: The number of uni...
ARTS #50 Algorithm 本周选择的算法题是：Word Search II 规则如下： Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adjace...
ARTS #49 Algorithm 本周选择的算法题是：Video Stitching 规则如下： You are given a series of video clips from a sporting event that lasted T seconds. These video clips can be overlapping with each other and have varied ...
ARTS #48 Algorithm 本周选择的算法题是：Letter Combinations of a Phone Number 规则如下： Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A m...
ARTS #47 Algorithm 本周选择的算法题是：N-Queens 规则如下： The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all distin...