LeetCode --- Minimum Path Sum

题目链接

简单倒推

附上代码:

 1 class Solution {
 2 public:
 3     int minPathSum(vector<vector<int> > &grid) {
 4         int n = (int)grid.size();
 5         if (n == 0) return 0;
 6         int m = (int)grid[0].size();
 7         
 8         for (int i = m-2; i >= 0; i--) grid[n-1][i] += grid[n-1][i+1];
 9         for (int i = n-2; i >= 0; i--) grid[i][m-1] += grid[i+1][m-1];
10         for (int i = n-2; i >= 0; i--) for (int j = m-2; j >= 0; j--)
11             grid[i][j] += min(grid[i+1][j], grid[i][j+1]);
12             
13         return grid[0][0];
14     }
15 };

 

posted on 2014-06-04 14:38  Stomach_ache  阅读(145)  评论(0)    收藏  举报

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