#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define mp make_pair

int main(){
    int h,w;
    cin>>h>>w;
    char arr[h][w];
    for(int i=0;i<h;i++){
        for(int j=0;j<w;j++){
            cin>>arr[i][j];
        }
    }
    int ans=0;
    if(arr[0][0]=='*'){
        ans++;
    }
    int i=0,j=0;
    while(1){
        if(j==w-1 && i==h-1){
            break;
        }
        if(j==w-1){
            if(arr[i+1][j]=='*'){
                ans++;
            }
            i++;
            //cout<<ans<<" "<<i<<" "<<j<<endl;
            continue;
        }
        if(i==h-1){
            if(arr[i][j+1]=='*'){
                ans++;
            }
            j++;
            //cout<<ans<<" "<<i<<" "<<j<<endl;
            continue;
        }
        if((arr[i][j+1]=='*' && arr[i+1][j]=='*')|| arr[i][j+1]=='*' && arr[i+1][j]=='.' ){
            j++;
            ans++;
        }
        else if(arr[i][j+1]=='.' && arr[i+1][j]=='.'){
            j++;
        }
        else{
            i++;
            ans++;
        }
        //cout<<ans<<" "<<i<<" "<<j<<endl;
    }
    cout<<ans;
    return 0;
}