Your car starts at position 0 and speed +1 on an infinite number line.  (Your car can go into negative positions.) Your car drives automatically according to a sequence of instructions A (accelerate) and R (reverse). When you get an instruction "A&qu…

Your car starts at position 0 and speed +1 on an infinite number line.  (Your car can go into negative positions.) Your car drives automatically according to a sequence of instructions A (accelerate) and R (reverse). When you get an instruction "A&qu…

https://leetcode.com/problems/race-car/description/ 1. BFS剪枝 0<=current position<=2*target.为什么2*target有点不太明白 class Solution { public: ]; struct Node{ int pos; int speed; int step; Node(int p,int s,int ss){ pos=p; speed=s; step=ss; } }; int racecar(i…

原题链接在这里:https://leetcode.com/problems/race-car/ 题目: Your car starts at position 0 and speed +1 on an infinite number line.  (Your car can go into negative positions.) Your car drives automatically according to a sequence of instructions A (accelerate…

请点击页面左上角 -> Fork me on Github 或直接访问本项目Github地址:LeetCode Solution by Swift    说明:题目中含有$符号则为付费题目. 如:[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down 请下拉滚动条查看最新 Weekly Contest!!! Swift LeetCode 目录 | Catalog 序        号 题名Title 难度     Difficulty  两数之…

最近刷LeetCode比较频繁,就购买了官方的参考电子书 (CleanCodeHandbook),里面有题目的解析和范例源代码,可以省去非常多寻找免费经验分享内容和整理这些资料的时间.惊喜的是,里面的所有源代码都是用java语言写的. 接下来的一段时间里,我会将里面的大部分内容翻译成中文,再加上一些小y自己的解法和扩展内容,以博客的形式发在博客园.我想,这会是一件非常有趣的事情. 以下是翻译的前言部分,第1.4题以及其解析部分. 前言: 嗨,各位刷LeetCode的小伙伴们. 就像你们看到这本书…

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome. Note: Have you consider that…

题目来源 https://leetcode.com/problems/valid-palindrome/ Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a plan, a canal: Panama" is a palindrome."race a car"…

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a plan, a canal: Panama" is a palindrome."race a car" is not a palindrome. Note:Have you consider that th…

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome. Note: Have you consider that…