public static void main(String[] args) {

        int[][] arr = new int[10][10];
        Random random = new Random();

        for (int i = 0; i < 10; i++) {
            for (int j = 0; j < 10; j++) {
                arr[i][j] = random.nextInt();
            }
        }

        int[][] sumarr = new int[10][10];
        int max = 0;

        for (int i = 0; i < 10; i++) {
            for (int j = 0; j < 10; j++) {

                if (i > 0 && i < 9) {
                    sumarr[i][j] += arr[i-1][j] + arr[i+1][j];
                } else if (i == 0) {
                    sumarr[i][j] += arr[i+1][j];
                } else if (i == 9) {
                    sumarr[i][j] += arr[i-1][j];
                }

                if (j > 0 && j < 9) {
                    sumarr[i][j] += arr[i][j-1] + arr[i][j+1];
                } else if (i == 0) {
                    sumarr[i][j] += arr[i][j+1];
                } else if (i == 9) {
                    sumarr[i][j] += arr[i][j-1];
                }
                if (sumarr[i][j] > max) {
                    max = sumarr[i][j];
                }
            }
        }

        System.out.println(max);
    }