#include<fstream>
using namespace std;
ifstream fin("squaredetector.in");
ofstream fout("squaredetector.out");

int a[50][50],n,i,t,j,cont;
char ch;

int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
            fin>>ch;
            if(ch=='#') {
                a[i][j]=0;
                cont++;
            }
            else a[i][j]=1;
        }
        //fin>>ch;
    }
    fout<<cont;
    for(i=1;i<=25;i++)
    {

    }
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        {
           // fout<<a[i][j]<<" ";
        }
       // fout<<"\n";
    }
}