Count squares

m, n = map(int, input().split())

matrix = []
while m:
    matrix.append(list(input()))
    m -= 1

count = 0

for i in range(len(matrix)):
    for j in range(len(matrix[0])):
        if matrix[i][j] == '#':
            count += 1
            matrix[i][j] = '.'

            st = [(i, j)]
            while st:
                x, y = st.pop()
                for xp, yp in [(x+1, y), (x-1, y), (x, y+1), (x, y-1)]:
                    if xp >= 0 and yp >= 0 and xp < len(matrix) and yp < len(matrix[0]):
                        if matrix[xp][yp] == '#':
                            st.append((xp, yp))
                            matrix[xp][yp] = '.'

print(count)