using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Eldberget
{
    class Node
    {
        public int x;
        public int y;
        public int ln;
    }
    class Program
    {
        static void Main(string[] args)
        {
            Node p = new Node();
            p.x = 0;
            p.y = 0;
            p.ln = 0;
            string indata = Console.ReadLine();
            string[] indataArray = indata.Split();
            int total = 0;
            int x = int.Parse(indataArray[0]) - 1;
            int y = int.Parse(indataArray[1]) - 1;
            int k = int.Parse(indataArray[2]);
            String[,] rutnät = new String[x + 1, y + 1];
            Boolean[,] redanV = new bool[x + 1, y + 1];
            redanV[0, 0] = true;
            for (int i = 0; i < y + 1; i++)
            {
                indata = Console.ReadLine();
                for (int j = 0; j < x + 1; j++)
                {
                    rutnät[j, i] = indata[j].ToString();
                }
            }
            Queue<Node> kö = new Queue<Node>();
            kö.Enqueue(p);
            while (kö.Count > 0)
            {
                Node cur = kö.Dequeue();
                total = cur.ln;
                if (cur.x + 1 <= x && rutnät[cur.x + 1, cur.y] != "#" && redanV[cur.x + 1, cur.y] == false)
                {
                    Node next = new Node();
                    next.x = cur.x + 1;
                    next.y = cur.y;
                    next.ln = cur.ln + 1;
                    kö.Enqueue(next);
                    redanV[cur.x + 1, cur.y] = true;
                }
                if (cur.y + 1 <= y && rutnät[cur.x, cur.y + 1] != "#" && redanV[cur.x, cur.y + 1] == false)
                {
                    Node next = new Node();
                    next.x = cur.x;
                    next.y = cur.y + 1;
                    next.ln = cur.ln + 1;
                    kö.Enqueue(next);
                    redanV[cur.x, cur.y + 1] = true;
                }
                if (cur.y - 1 >= 0 && rutnät[cur.x, cur.y - 1] != "#" && redanV[cur.x, cur.y - 1] == false)
                {
                    Node next = new Node();
                    next.x = cur.x;
                    next.y = cur.y - 1;
                    next.ln = cur.ln + 1;
                    kö.Enqueue(next);
                    redanV[cur.x, cur.y - 1] = true;
                }
                if (cur.x - 1 >= 0 && rutnät[cur.x - 1, cur.y] != "#" && redanV[cur.x - 1, cur.y] == false)
                {
                    Node next = new Node();
                    next.x = cur.x - 1;
                    next.y = cur.y;
                    next.ln = cur.ln + 1;
                    kö.Enqueue(next);
                    redanV[cur.x - 1, cur.y] = true;
                }
            }
            if (redanV[x, y] == false)
            {
                Console.WriteLine("nej");
            }
            else
            {
                Console.WriteLine(total);
            }
            Console.ReadKey();
        }
    }
}