using System;
using System.Linq;

namespace Core_Tasks_2
{
    class Program
    {
        static void Main(string[] args)
        {
            //int size = 5;
            int size = Int32.Parse(Console.ReadLine());

            string[][] matrix = new string[size][];

            //int[][] matrix = new int[][]
            //{
            //    new int[] { 1, 22, 3, 41, 5, 2 },
            //    new int[] { 2, 13, 4, -5, 6, 5 },
            //    new int[] { -6, 5, 9, 31, 2, 8 },
            //    new int[] { 3, 14, 5, -6, 7, 4 },
            //    new int[] { 4, -5, 6, -7, 8, 7 },
            //};

            long sum = Int64.MinValue;

            for (int row = 0; row < size; row++)
            {

                matrix[row] = Console.ReadLine().Split(' ');

            }



            //int[] rc = "-3 -3 3 3 4 -3 -4 3".Split(' ').Select(n => Int32.Parse(n)).ToArray();
            int[] rc = Console.ReadLine().Split(' ').Select(n => Int32.Parse(n)).ToArray();


            for (int i = 0; i < rc.Length; i += 2)
            {
                int rowLength = matrix[0].Length;

                int r = rc[i];
                int c = rc[i + 1];

                Console.WriteLine(r + "  " + c);

                int sPointX = 0;
                int sPointY = 0;

                int ePointX = 0;
                int ePointY = 0;



                if (r < 0)
                {
                    sPointX = rowLength - 1;
                    sPointY = Math.Abs(r) - 1;
                }
                else
                {
                    sPointX = 0;
                    sPointY = r - 1;
                }

                if (c < 0)
                {
                    ePointX = Math.Abs(c) - 1;
                    ePointY = size - 1;
                }
                else
                {
                    ePointX = c - 1;
                    ePointY = 0;
                }

                //Console.WriteLine("Initial Y: " + sPointY + " X: " + sPointX);

                bool alive = true;
                bool horizontal = true;
                bool vertical = false;

                int tmpSum = 0;
                //Console.WriteLine();

                while (alive)
                {

                    //Console.WriteLine("Sequence: " + matrix[sPointY][sPointX]);
                    //Console.WriteLine("Y: " + sPointY + " X: " +sPointX);


                    tmpSum += Int32.Parse(matrix[sPointY][sPointX]);

                    if (sPointX == ePointX && sPointY == ePointY)
                        break;

                    if (r < 0)
                    {
                        if (sPointX == ePointX)
                        {
                            horizontal = false;
                            vertical = true;
                        }

                        if (horizontal)
                        {
                            sPointX--;
                        }

                    }
                    else
                    {
                        if (sPointX == ePointX)
                        {
                            horizontal = false;
                            vertical = true;
                        }

                        if (horizontal)
                        {
                            sPointX++;
                        }
                    }

                    if (c < 0)
                    {
                        if (sPointY == ePointY)
                        {
                            vertical = true;
                        }

                        if (vertical)
                        {
                            sPointY++;
                        }



                    }
                    else
                    {
                        if (sPointY == ePointY)
                        {
                            vertical = false;
                        }

                        if (vertical)
                        {
                            sPointY--;
                        }
                    }


                }

                //Console.WriteLine(tmpSum);


                if (tmpSum > sum)
                    sum = tmpSum;
            }


            Console.WriteLine(sum);
        }
    }
}