#include <bits/stdc++.h>

using namespace std;

int a,b;

void dfs(int i, int j , vector<vector<int>>& vis, vector<vector<char>> y) {
    vis[i][j] = 1;
    if(i + 1 < a) {
        if(y[i+1][j] == '.' && !vis[i+1][j]) {
            dfs(i + 1, j, vis, y);
        }
    }
    if(j + 1 < b) {
        if(y[i][j+1] == '.' &&  !vis[i][j + 1]) {
            dfs(i, j + 1, vis, y);
        }
    }
  if(i - 1 >= 0) {
    if(y[i-1][j] == '.' && !vis[i-1][j]) {
      dfs(i-1, j, vis, y);
    }
  }
  if(j - 1 >= 0) {
    if(y[i][j-1] == '.' && !vis[i][j - 1]) {
      dfs(i, j - 1, vis, y);
    }
  }
}


int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
    cin >> a >> b;
    vector<vector<char>> y(a, vector<char> (b));
    for (int i = 0; i<a; i++) {
        for (int j = 0; j<b; j++) {
            cin >> y[i][j];
        }
    }
    vector<vector<int>> vis(1002, vector<int> (1002, 0));
    int ans = 0;
    for (int i = 0; i<a; i++) {
        for (int j = 0; j<b; j++) {
            if(y[i][j] == '.' && !vis[i][j]) {
                ans++;
                dfs(i, j, vis, y);
            }
        }
    }
  cout << ans << '\n';
  return 0;
}