[LeedCode OJ]#63 Unique Paths II

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[LeedCode OJ]#63 Unique Paths II

[ 声明:版权全部,转载请标明出处,请勿用于商业用途. 联系信箱:libin493073668@sina.com] 题目链接:https://leetcode.com/problems/unique-paths-ii/ 题意: 给定一个二维矩阵,当中0代表这个位置能够走.1代表这个位置不能走,还是从(1,1)走到(n,m).问有多少种走法思路: dp[i][j]代表走到(i,j)有多少种走法因为(i,j)仅仅能从(i-1,j)与(i,j-1)走到,所以状态转移方程为: dp[i][j]=…

LeetCode OJ 63. Unique Paths II

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…

leetcode 62. Unique Paths 、63. Unique Paths II

62. Unique Paths class Solution { public: int uniquePaths(int m, int n) { || n <= ) ; vector<vector<int> > dp(m,vector<int>(n)); dp[][] = ; ;i < m;i++) dp[i][] = ; ;i < n;i++) dp[][i] = ; ;i < m;i++){ ;j < n;j++){ dp[i][j]…

62. Unique Paths && 63 Unique Paths II

https://leetcode.com/problems/unique-paths/ 这道题,不利用动态规划基本上规模变大会运行超时,下面自己写得这段代码,直接暴力破解,只能应付小规模的情形,当23*12时就超时了: class Solution { public: // Solution():dp1(m,vector<int>(n,-1)),dp2(m,vector<int>(n,-1)){ // } int uniquePaths(int m, int n) { helper…

【LeetCode】63. Unique Paths II

Unique Paths II 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 obsta…

[LeetCode] 63. Unique Paths II 不同的路径之二

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…