using System;
using System.Linq;

namespace judgeMatrix
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] size = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int rowsInput = size[0];
            int colsInput = size[1];
            int[,] matrix = new int[rowsInput,colsInput];
            int currentRow = 0;
            int currentCol = 0;
            int money = 0;
            int left = 0;
            int right = 0;
            int down = 0;
            int up = 0;

            for (int rows = 0; rows < rowsInput; rows++)
            {
                int[] input = new int[colsInput];
                    input = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

                for (int cols = 0; cols < colsInput; cols++)
                {
                    matrix[rows, cols] = input[cols];

                    if (matrix[rows,cols] == 0)
                    {
                        currentRow = rows;
                        currentCol = cols;
                    }
                }
            }
            //MatrinPrint(rowsInput,colsInput,matrix);

            while (true)
            {
                if (currentRow != 0)
                {
                    up = matrix[currentRow - 1, currentCol];
                }
                else
                {
                    up = 0;
                }
                if (currentRow != rowsInput-1)
                {
                    down = matrix[currentRow + 1, currentCol];
                }
                else
                {
                    down = 0;
                }
                if (currentCol != 0 )
                {
                    left = matrix[currentRow, currentCol - 1];
                }
                else
                {
                    left = 0;
                }
                if (currentCol != colsInput -1)
                {
                    right = matrix[currentRow, currentCol +1];
                }
                else
                {
                    right = 0;
                }

                if (right == 0 && left==0 && up == 0 && down ==0)
                {
                    break;
                }

                if (left >= right && left >= up && left >= down)
                {
                    currentCol = currentCol - 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                else if (right >= up && right >= down)
                {
                    currentCol = currentCol + 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                else if (up >=down)
                {
                    currentRow = currentRow - 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                else
                {
                    currentRow = currentRow + 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                /*
                if (right == left && right == down && right == up)
                {
                    currentCol = currentCol - 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                if (left == up && left == down)
                {
                    currentCol = currentCol + 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                if (up == down)
                {
                    currentRow = currentRow - 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }

                if (up > down && left > right)
                {
                    currentRow = currentRow - 1;
                    currentCol = currentCol - 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                if (up > down && left < right)
                {
                    currentRow = currentRow - 1;
                    currentCol = currentCol + 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                if (up < down && left > right)
                {
                    currentRow = currentRow + 1;
                    currentCol = currentCol - 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                if (up < down && left < right)
                {
                    currentRow = currentRow + 1;
                    currentCol = currentCol + 1;
                    matrix[currentRow, currentCol] = matrix[currentRow, currentCol] - 1;
                    money++;
                }
                */
            }
            Console.WriteLine(money);
        }

        private static void MatrinPrint(int lenOfRows, int lenOfCols, int[,] matrix)
        {
            for (int rows = 0; rows < lenOfRows; rows++)
            {
                for (int cols = 0; cols < lenOfCols; cols++)
                {
                    Console.Write(matrix[rows,cols]+ " ");
                }
                Console.WriteLine();
            }
        }
    }
}