C

#include <bits/stdc++.h>

using namespace std;

int main()
{
    int n, m;
    cin>>n>>m;

    vector<string> s(n);
    for(auto &e: s)   cin>>e;

    vector<vector<int>> vis(n, vector<int> (m, 0));
    int x[8] = {-1, -1, -1, 0, 0, 1, 1, 1};
    int y[8] = {-1, 0, 1, -1, 1, -1, 0, 1};

    function<void(int, int)> DFS = [&](int i, int j)
    {
        vis[i][j] = 1;

        for(int d=0; d<8; d++)
        {
            if(i+x[d]>=0 && i+x[d]<n && j+y[d]>=0 && j+y[d]<m && !vis[i+x[d]][j+y[d]] && s[i+x[d]][j+y[d]]=='#')
                DFS(i+x[d], j+y[d]);
        }
    };

    int ans = 0;

    for(int i=0; i<n; i++)
    {
        for(int j=0; j<m; j++)
        {
            if(!vis[i][j] && s[i][j]=='#')
            {
                ans++;
                DFS(i, j);
            }
        }
    }

    cout<<ans<<"\n";
}