最小路径和

代码：

public class Solution { 

        /**

         * @param grid: a list of lists of integers.

         * @return: An integer, minimizes the sum of all numbers along its path

         */ 

        int min(int a, int b){ 

            if (a < b) return a; 

            else return b; 

        } 

        public int minPathSum(int[][] grid) { 

            // write your code here 

            int m = grid.length; 

            int n = grid[0].length; 

            int [][] dp = new int [m][n]; 

            dp[0][0] = grid[0][0]; 

            for (int i = 1; i < m; i++) 

                dp[i][0] = dp[i-1][0] + grid[i][0]; 

            for (int j = 1; j < n; j++) 

                dp[0][j] = dp[0][j-1] + grid[0][j]; 

            for (int i = 1; i < m; i++) 

                for (int j = 1; j < n; j++) 

                    dp[i][j] = min(dp[i-1][j], dp[i][j-1]) + grid[i][j]; 

            return dp[m-1][n-1]; 

        } 

}

lintcode截图：