temp3

#include <iostream>
#include <iomanip>
#include <cstring>
#include <string>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <cmath>
#include <fstream>
#include <queue>
#include <iterator>
#include <bitset>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>

using namespace std;

//Utilities
#define sqr(x) ((x)*(x))
#define cbr(x) ((x)*(x)*(x))
#define rep(c, i, n) for((i)=(c); (i)<(n); (i)++)

//Geometry
/**
struct pt { long long x, y; };
double vecmul(pt a, pt b) { //Векторное умножение А*В
    return (a.x*b.y - b.x*a.y);
}
//скалярное умножение a*b = |a|*|b|*cos(a,b)

double dist(double ax, double ay, double bx, double by) { return sqrt(sqr(ax - bx) + sqr(ay - by)); }
*/

//DBG
//template<typename T, typename T2>void printarr(T  a[], T2 sz, T2 beg = 0) { for (T2 i = beg; i<sz; i++) cout << a[i] << " "; cout << endl; }
#define DBG(a)         cout<<#a<<"="<<(a)<<"\n"
#define DBG2(a,b)       cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<"\n"
#define DBG3(a,b,c)     cout<<#a<<"="<<(a)<<", "<<#b<<"="<<(b)<<", "<<#c<<"="<<(c)<<"\n"

//Files
#define FILE_MODE(FILE) freopen(FILE".in", "r", stdin), freopen(FILE".out", "w", stdout)

//Constants
#define PI    3.1415926535897932
#define INF   1011111111
#define LLINF 1000111000111000111LL
#define eps   1e-14
#define mod   1000000007
#define ll long long
#define ull unsigned long long
//-------------------------------------------------
#define N 40

int n;
char lab[N][N];
int paint=0;

void dfs(int x, int y);

int main() {
    cin >> n;
    int i, j;
    rep(0, i, n+2) {
        lab[0][i] = '#';
        lab[n + 1][i] = '#';
        lab[i][0] = '#';
        lab[i][n + 1] = '#';
    }
    rep(0, i, n) {
        rep(0, j, n) {
            cin >> lab[i+1][j+1];
        }
    }
    rep(0, i, n+2) {
        rep(0, j, n+2) {
            cout << lab[i][j];
        }
        cout << endl;
    }
    dfs(1, 1);
    dfs(n - 1, n - 1);
    cout << paint*9-36;
    return 0;
}

void dfs(int y, int x)
{
    lab[y][x] = '$';
    if (lab[y][x + 1] == '#') { paint++; };
    DBG3(y, x, paint);

    if (lab[y][x - 1] == '#') { paint++; };
    DBG3(y, x, paint);

    if (lab[y + 1][x] == '#') { paint++; };
    DBG3(y, x, paint);

    if (lab[y - 1][x] == '#') { paint++; };
    DBG3(y, x, paint);
    cout << endl;


    if (lab[y][x + 1] == '.') { dfs(y, x + 1); };
    if (lab[y][x - 1] == '.') { dfs(y, x - 1); };
    if (lab[y + 1][x] == '.') { dfs(y + 1, x); };
    if (lab[y - 1][x] == '.') { dfs(y - 1, x); };
}