#include<bits/stdc++.h>
using namespace std;
long n,m,cnt=0;
bool check[105][105];
char a[105][105];
void loang(long i,long j)
{
	if(check[i][j]||i>=n||i<0||j>=m||j<0||a[i][j]=='#')
	{
		return;
	}
	cnt++;
	check[i][j]=1;
	loang(i+1,j);
	loang(i,j+1);
	loang(i-1,j);
	loang(i,j-1);
}
int main()
{
	cin>>n>>m;
	long i,j;
	for(i=0;i<n;i++)
	{
		cin>>a[i];
	}
	/*for(i=0;i<n;i++)
	{
		if(!check[i][0]&&a[i][0]=='.') loang(i,0);
		if(!check[i][m-1]&&a[i][m-1]=='.') loang(i,m-1);
	}
	for(i=0;i<m;i++)
	{
		if(!check[0][i]&&a[0][i]=='.') loang(0,i);
		if(!check[n-1][i]&&a[n-1][i]=='.') loang(n-1,i);
	}*/
	for(i=0; i<n;i++)
	{
		for(j=0;j<m;j++)
		{
			if(!check[i][j] && a[i][j] == '.' &&(i == 0 || i == n-1 || j == 0 || j == m - 1)) loang(i,j);
		}
	}
	cout<<m*n-cnt;
}

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NyA2Ci4uLi4uLi4KLi4jIyMuLgouIyMuIyMuCi4uIy4uIy4KLi4jIyMjLgouLi4uLi4uCg==

7 6
.......
..###..
.##.##.
..#..#.
..####.
.......