Code Challenge – How many rooms are there?

Problems

Giving a floor with tiles

X 0 0 X
0 X 0 0
0 X 0 0

Where X is free space, 0 is wall space

A room can be composed by connected free spaces, rooms are divided by wall

Try to calculate how many rooms can be composed there

In above example, there are 3 rooms

X - - -
- - - -
- - - -

- - - X
- - - -
- - - -

- - - -
- X - -
- X - -

Input:

A 2D matrix, where 1 is free space, 0 is wall space

[
	[1, 0, 0, 1],
	[0, 1, 0, 0],
	[0, 1, 0, 0],
]

Output:

Number of rooms can be composed

I’ve created a repository for this, you can check it here https://gitlab.com/martinpham/calculate-rooms,