[LeetCode] Unique Paths II
2012-11-15 21:29
387 查看
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
For example,
There is one obstacle in the middle of a 3x3 grid as illustrated below.
The total number of unique paths is
Note: m and n will be at most 100.
同上题,稍作修改。
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
1and
0respectively in the grid.
For example,
There is one obstacle in the middle of a 3x3 grid as illustrated below.
[ [0,0,0], [0,1,0], [0,0,0] ]
The total number of unique paths is
2.
Note: m and n will be at most 100.
同上题,稍作修改。
class Solution { public: int uniquePathsWithObstacles(vector<vector<int> > &obstacleGrid) { // Start typing your C/C++ solution below // DO NOT write int main() function vector<vector<int> > f(obstacleGrid.size(), vector<int>(obstacleGrid[0].size())); f[0][0] = obstacleGrid[0][0] == 1 ? 0 : 1; for(int i = 1; i < f.size(); i++) f[i][0] = obstacleGrid[i][0] == 1 ? 0 : f[i-1][0]; for(int i = 1; i < f[0].size(); i++) f[0][i] = obstacleGrid[0][i] == 1 ? 0 : f[0][i-1]; for(int i = 1; i < f.size(); i++) for(int j = 1; j < f[i].size(); j++) f[i][j] = obstacleGrid[i][j] == 1 ? 0 : f[i-1][j] + f[i][j-1]; return f[f.size()-1][f[0].size()-1]; } };
相关文章推荐
- LeetCode Unique Paths II
- [LeetCode]63 Unique Paths II
- LeetCode 64/62/63. Minimum Path Sum/ Unique Paths i, ii
- [leetcode] Unique Paths II
- [Leetcode]-Unique Paths II
- leetcode Unique Paths II
- LeetCode : Unique Paths II
- Leetcode Unique Paths II
- [LeetCode 063] Unique Paths II
- LeetCode – Refresh – Unique Paths II
- Unique Paths II ——LeetCode
- LeetCode Unique Paths II
- Unique Paths II--LeetCode
- LeetCode-62. Unique Paths/63. Unique Paths II
- 【Leetcode】Unique Paths II
- [Leetcode] Unique Paths II
- [LeetCode] Unique Paths II
- leetcode — unique-paths-ii
- [LeetCode]Unique Paths II
- LeetCode -- Unique Paths II