for(int i = 0; i < 10; i++)
        {
            if(i % 2 == 0) //even
            {
                int[] s = new int[10];
                for(int j = 0; j < 10; j++) s[j] = a[i][j];
                Arrays.sort(s);
                for(int j = 0; j < 10; j++) a[i][j] = s[j];
            }
            else //odd
            {
                int[] s = new int[10];
                for(int j = 0; j < 10; j++) s[j] = a[i][j];
                Arrays.sort(s);
                for(int j = 9; j >= 0; j--) a[i][j] = s[j];
            }
        }