题解 | #礼物的最大价值#

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param grid int整型二维数组 
     * @return int整型
     */
    public int maxValue (int[][] grid) {
        // write code here
        int[][] dp = new int[grid.length][grid[0].length];
        dp[0][0] = grid[0][0];
        for (int j = 1; j < grid[0].length; j++) {
            dp[0][j] = dp[0][j - 1] + grid[0][j];
        }
        for (int i = 1; i < grid.length; i++) {
            dp[i][0] = dp[i - 1][0] + grid[i][0];
        }
        for (int i = 1; i < grid.length; i++) {
            for (int j = 1; j < grid[0].length; j++) {
                dp[i][j] = Math.max(dp[i - 1][j], dp[i][j - 1]) + grid[i][j];
            }
        }
        return dp[dp.length - 1][dp[0].length - 1];
    }
}