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 ...
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...
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). How many possible unique paths are there? Above is a 3 x 7 grid. How many possible unique paths are there?
class Solution(object): def uniquePaths(self, m, n): """ :type m: int :type n: int :rtype: int """ dp = [[1 for i in range(n)] for i in range(m)] for i in range(1, m): for j in range(1, n): dp[i][j] = dp[i-1][j] + dp[i][j-1] return dp[m-1]...
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...
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 bottom-right corner of the gr...
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 ...
63. 不同路径 II - 给定一个 m x n 的整数数组 grid。一个机器人初始位于 左上角(即 grid[0][0])。机器人尝试移动到 右下角(即 grid[m - 1][n - 1])。机器人每次只能向下或者向右移动一步。 网格中的障碍物和空位置分别用 1 和 0 来表示。机器人的移动路径中不能包含
Unique Paths? leetcode 62 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...