本文senlie原版的,转载请保留此地址:http://blog.csdn.net/zhengsenlie Candy Total Accepted: 16494 Total Submissions: 87468My Submissions There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjecte…

快速上手leetcode动态规划题 我现在是初学的状态,在此来记录我的刷题过程,便于以后复习巩固. 我leetcode从动态规划开始刷,语言用的java. 一.了解动态规划 我上网查了一下动态规划,了解到动态规划是“带有备忘录的递归”, 而大多数用来理解动态规划的例子都是斐波那契数列,就是那个经典的递归式 f(i)=f(i-1)+f(i-2) ,f(1)=f(2)=1 那么我们就可以得到很多式子,比如求f(5): f(5)=f(4)+f(3); f(4)=f(3)+f(2); f(3)=f(2)…

Candy There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following requirements: Each child must have at least one candy. Children with a higher rating get more ca…

原文:http://www.cnblogs.com/AndyJee/p/4483043.html There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following requirements: Each child must have at least one candy…

最近接触了动态规划这个厉害的方法,还在慢慢地试着去了解这种思想,因此就在LeetCode上面找了几道比较简单的题目练了练手. 首先,动态规划是什么呢?很多人认为把它称作一种"算法",其实我认为把它称作一种"思想"更为合适:利用动态规划去解决问题,其实就是逐步递推的过程,与贪心算法不同,动态规划递推的每一步都要求是当前的最优解(这是很重要的,递推的正确性依赖的就是这一点):利用动态规划解题时,必须自己定义出来状态和状态转移方程.然而,看上去简单,做起来却非常困难,因为…

动态规划:适用于子问题不是独立的情况,也就是各子问题包含子子问题,若用分治算法,则会做很多不必要的工作,重复的求解子问题,动态规划对每个子子问题,只求解一次将其结果保存在一张表中,从而避免重复计算. 动态规划最优化问题中的两个要素:最优子结构和重叠子问题 动态规划是以自底向上的方式来利用最优子结构,寻找问题的一个最优解需要在子问题中做出选择,即选择将用哪一个来求解问题 leetcode中的对应题目 1.其中dp[i]表示i节点的最终要求 Climbing Stairs # step[i] = s…

This question is about implementing a basic elimination algorithm for Candy Crush. Given a 2D integer array board representing the grid of candy, different positive integers board[i][j] represent different types of candies. A value of board[i][j] = 0…

原题链接在这里:https://leetcode.com/problems/candy-crush/ 题目: This question is about implementing a basic elimination algorithm for Candy Crush. Given a 2D integer array board representing the grid of candy, different positive integers board[i][j] represent…

This question is about implementing a basic elimination algorithm for Candy Crush. Given a 2D integer array board representing the grid of candy, different positive integers board[i][j] represent different types of candies. A value of board[i][j] = 0…

以下题号均为LeetCode题号,便于查看原题. 10. Regular Expression Matching 题意:实现字符串的正则匹配,包含'.' 和 '*'.'.' 匹配任意一个字符,"*" 匹配 '*' 之前的0个或多个字符. example: isMatch("aa","a") → false isMatch("aa","aa") → true isMatch("aaa",&…