题目链接:https://leetcode.com/problems/minimum-path-sum/#/description
Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path.
Note: You can only move either down or right at any point in time.
class Solution{
public:
int minPathSum(vector<vector<int>>& grid)
{
if(grid.size()==0||grid[0].size()==0)
return 0;
int m=grid.size(),n=grid[0].size();
int paths[m][n];
paths[0][0]=grid[0][0];
for(int i=1;i<m;i++)
{
paths[i][0]=paths[i-1][0]+grid[i][0];
}
for(int j=1;j<n;j++)
{
paths[0][j]=paths[0][j-1]+grid[0][j];
}
for(int i=1;i<m;i++)
{
for(int j=1;j<n;j++)
{
paths[i][j]=min(paths[i-1][j],paths[i][j-1])+grid[i][j];
}
}
return paths[m-1][n-1];
}
};