240116 leetcode第十四天 62. Unique Paths chocolatemilkway 1 人赞同了该文章 动态规划mid题 收获:了解了递归是低阶版的dp,dp在原有递归的基础上用空间换了时间,因此有些题用递归跑会超时,得用dp,比如此题。递归三步走:1.看达到什么边界条件时直接返回 2.看递归需要的参数,比如此题就是i,j,分别代表右...
LeetCode题解之Unique Paths 1、题目描述 2、 问题分析 使用动态规划求解 3、代码 1intuniquePaths(intm,intn) {2vector<vector<int> > sum(m, vector<int>(n,0));34for(inti =0; i < m; i++)5sum[i][0] =1;6for(intj =0; j < n; j++)7sum[0][j] =1;89for(inti =1;i < m...
https://leetcode.com/problems/unique-paths/description/ 62. 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 bottom-r...
本题是 LeetCode 63 的简化版,可以直接复用其思路,化用对应代码即可。 设dp[i][j] 表示从 (0, 0) 到 (i - 1, j - 1) 的不同路径数,这里 i 和 j 都比对应格子的下标大 1 ,是为了方便处理第一行和第一列的情况,避免越界判断。 初始状态:dp[i][j] = 0; dp[0][1] = 1 。 【注意】这...
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 try...[leetcode] 62. Unique Paths 题目: A robot is located at the top-left ...
Unique Paths II -- LeetCode 原题链接:http://oj.leetcode.com/problems/unique-paths-ii/ 这道题跟Unique Paths非常类似,只是这道题给机器人加了障碍,不是每次都有两个选择(向右,向下)了。因为有了这个条件,所以Unique Paths中最后一个直接求组合的方法就不适用了,这里最好的解法就是用动态规划了。递推...
Given the two integers m and n, return the number of possible unique paths that the robot can take to reach the bottom-right corner.The test cases are generated so that the answer will be less than or equal to 2 * 109.Example 1:Input: m = 3, n = 7 Output: 28 ...
62.Unique Paths A robot is located at the top-left corner of amxngrid (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 the diagram below...
【Leetcode】Unique Paths https://leetcode.com/problems/unique-paths/ 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 ...
题目地址:https://leetcode.com/problems/unique-paths/description/ 题目描述: 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 ...