include<iostream>

include<bits/stdc++.h>

using namespace std; int main(){ int n,m,k,a[25][25],i,j; char t; cin>>n>>m; for(i=1;i<=n;i++) for(j=1;j<=m;j++){ cin>>t; if(t=='#') a[i][j]=1; } for(i=1;i<=n;i++){ for(j=1;j<=m;j++){ if(a[i][j]==1 && a[i-1][j]==0 && a[i][j-1]==0){ k++; } } } cout<<k; return 0; }