#include <bits/stdc++.h>
using namespace std;
//------------------------------DEFINE------------------------------
//******************************************************************
#define IOS ios_base::sync_with_stdio(false); cin.tie(0),cout.tie(0)
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
#define endl "\n"
//******************************************************************
//----------------------------FUNCTION------------------------------
//******************************************************************
ll gcd(ll a,ll b){
if(a>b) swap(a,b);
if(a==0) return a+b;
return gcd(b%a,a);
}
ll lcm(ll a,ll b){
return a/gcd(a,b)*b;
}
bool is_prime(ll n){
ll k=sqrt(n);
if(n==2) return true;
if(n<2||n%2==0||k*k==n) return false;
for(int i=3;i<=k;i+=2){
if(n%i==0){
return false;
}
}
return true;
}
//*****************************************************************
//--------------------------MAIN-CODE------------------------------
const int mxn=4000+5;
int t=1,n,m,a,b,color[mxn][mxn];
char arr[mxn][mxn];
void dfs(int x,int y){
color[x][y]=1;
if(!color[x+1][y]&&arr[x+1][y]=='.'){
dfs(x+1,y);
}
if(!color[x-1][y]&&arr[x-1][y]=='.'){
dfs(x-1,y);
}
if(!color[x][y+1]&&arr[x][y+1]=='.'){
dfs(x,y+1);
}
if(!color[x][y-1]&&arr[x][y-1]=='.'){
dfs(x,y-1);
}
}
void solve(){
cin>>n>>m;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
cin>>arr[i][j];
}
}
int ans=0;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(arr[i][j]=='.'&&!color[i][j]){
dfs(i,j);
ans++;
}
}
}
cout<<ans<<endl;
}
int main(){
IOS;
//cin>>t;
while(t--){
solve();
}
return 0;
}
