#include<bits/stdc++.h>
using namespace std;
struct Node{
	int x,y,k;
};
int n,m;
int fx[4]={0,1,0,-1};
int fy[4]={1,0,-1,0};
char a[41][41];
queue<Node> q; 
int main(){
   cin>>n>>m;
   q.push({1,1,1});
   for(int i=1;i<=n;i++){
   	for(int j=1;j<=m;j++){
   		cin>>a[i][j];
   	}
   }
   while(q.size()>0){
   	int x=q.front().x;
   	int y=q.front().y;
   	int k=q.front().k;
//   	a[x][y]='#';
   	if(x==n&&y==m){
   		cout<<k;
   		return 0;
   	}
   	for(int i=0;i<=3;i++){
   		int tx=x+fx[i];
   		int ty=y+fy[i];
   		if(tx>=1&&tx<=n&&ty>=1&&ty<=n&&a[tx][ty]=='.'){
   			q.push({tx,ty,k+1});
   		}
   	}
   	q.pop();
   }
   return 0;
}

/**************************************************************
	Problem: 1432
	User: chenjingqi
	Language: C++
	Result: Memory Limit Exceed
****************************************************************/