Number Of Rooms :
Difficulty Level : Easy
Submissions : 1646
Asked In :
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You are given a map of a building, and your task is to count the number of its rooms. The size of the map is $$$n \times m$$$ squares, and each square is either floor or wall. You can walk left, right, up, and down through the floor squares.
Input
The first input line has two integers $$$n$$$ and $$$m$$$: the height and width of the map.
Then there are $$$n$$$ lines of $$$m$$$ characters each describing the map. Each character is either '.' (floor) or '#' (wall).
Output
Print one integer: the number of rooms.
Example
Input
5 8 ######## #..#...# ####.#.# #..#...# ########
Output
3
Note
$$$1 \leq n, m \leq 1000$$$
