Minimum Path Sum

public class Solution {    public int minPathSum(int[][] grid) {        int row = grid.length;        int col = grid[0].length;        int[][] sum = new int[row][col];        sum[0][0] = grid[0][0];        for (int i = 1; i < row; i++) {            sum[i][0] = sum[i - 1][0] + grid[i][0];        }        for (int i = 1; i < col; i++) {            sum[0][i] = sum[0][i - 1] + grid[0][i];        }        for (int i = 1; i < row; i++) {            for (int j = 1; j < col; j++) {                sum[i][j] = Math.min(sum[i - 1][j], sum[i][j - 1]) + grid[i][j];            }        }        return sum[row - 1][col - 1];    }}