import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int a = in.nextInt(), b = in.nextInt();
        boolean arr[][] = new boolean[a][b];

        int counter = 0;

        for (int i = 0; i < a; i++) {
            String line = in.next();
            for (int j = 0; j < b; j++) {
                arr[i][j] = (line.charAt(j) == ('#'));
                if (arr[i][j]) {
                    if ((i == 0 || !arr[i - 1][j]) && (j == 0 || !arr[i][j - 1])) {
                        counter += 1;
                    }
                }
            }
        }

        System.out.println(counter);
    }
}