class Solution {
public:
    /*
     * @param grid: a list of lists of integers
     * @return: An integer, minimizes the sum of all numbers along its path
     */
    int minPathSum(vector<vector<int>> &grid) {
        // write your code here
        int row=grid.size();
        int col=grid[0].size();
        for(int j=col-2;j>=0;j--)
        {
            grid[row-1][j]+=grid[row-1][j+1];
        }
        for(int i=row-2;i>=0;i--)
        {
            for(int j=col-1;j>=0;j--)
            {
                if(j==col-1)
                {
                     grid[i][j]+=grid[i+1][j];
                     continue;
                }
                grid[i][j]+=min(grid[i][j+1],grid[i+1][j]);
            }
        }
        return grid[0][0];
    }
};