原题地址:https://leetcode.com/problems/minimum-path-sum/

大意:给出一个二维数组(int类型),求出从左上角到右下角最短的路径。

解决方法:动态规划

class Solution {
public:
int minPathSum(vector<vector<int>>& grid) {
int m = grid.size();
if(!m)
return ;
int n = grid[].size(); vector<vector<int>> coll(m, vector<int>(n, ));
coll[][] = grid[][];
for(int i = ; i < m; ++i)
coll[i][] = grid[i][] + coll[i - ][];
for(int i = ; i < n; ++i)
coll[][i] = grid[][i] + coll[][i - ]; for(int i = ; i < m; ++i)
for(int j = ; j < n; ++j)
coll[i][j] = min(coll[i - ][j], coll[i][j - ]) + grid[i][j]; return coll[m - ][n - ];
}
};

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