[题目] A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish'…

本文始发于个人公众号:TechFlow,原创不易,求个关注 今天是LeetCode专题第36篇文章,我们一起来看下LeetCode的62题,Unique Paths. 题意 其实这是一道老掉牙的题目了,我在高中信息竞赛的选拔考试上就见过这题.可想而知它有多古老,或者说多经典吧.一般来说能够流传几十年的算法题,一定是经典中的经典.下面我们就来看下它的题意. 这题的题意很简单,给定一个矩形的迷宫,左上角有一个机器人,右下角是目的地.这个机器人只能向下走或者是向右走,请问这个机器人走到目的地的路径一共…

题目来源 https://leetcode.com/problems/unique-paths/ A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bott…

Follow up for "Unique Paths": Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. For example, There is one obstacle in the middl…

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in t…

之前介绍了好多款html5和css3实现的动画,今天要给大家带来一款html5和css3实现的小机器人走路动画.该实例的人物用html5绘画的,动画效果是html5和css3实现的.一起看下效果图. 在线预览   源码下载 实现的代码. html代码: <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www…

题目 Total Accepted: 47928 Total Submissions: 148011 Difficulty: Medium Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path. Note: You can only move either…

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in t…

Leetcode 91. Decode Ways 解码方法(动态规划,字符串处理) 题目描述 一条报文包含字母A-Z,使用下面的字母-数字映射进行解码 'A' -> 1 'B' -> 2 ... 'Z' -> 26 给一串包含数字的加密报文,求有多少种解码方式 举个例子,已知报文"12",它可以解码为AB(1 2),也可以是L (12) 所以解码方式有2种. 测试样例 Input: "0" "121212" "1010…

Unique Path AGC 038 D 考虑如果两个点之间只能有一个边它们就把它们缩起来,那么最后缩起来的每一块都只能是一棵树. 如果两个点之间必须不止一个边,并且在一个连通块,显然无解. 首先把所有树给连好,现在的可用的边的数量只有 $ m - n + c $ 了. 然后两个连通块之间如果有超过一条边,连通块内部的点显然不只一条路径了. 其他情况,如果我们给连通块连边的时候每个连通块都只一直用一个点来往外连,就可以保证所有连通块都满足要求. 如果不存在两个点之间不只一个边的情况 那么只要可…