## Question 1
What is the output if the following grid is given as input?

$$ grid =
\begin{matrix}
[[1, 0, 0], \\
[0, 0, 0], \\
[0, 0, 1]]
\end{matrix}
$$
### Options

1. 1
Incorrect

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2. 0
Incorrect

----------------------------

3. 2
Correct
Cell 1s located at the top left and bottom right of the grid cannot be connected. Therefore, both of them form an island on their own, making a total of two islands.
----------------------------

4. 3
Incorrect

----------------------------

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## Question 2
What is the output if the following grid is given as input?

$$ grid =
\begin{matrix}
[[1, 1, 1], \\
[1, 1, 1], \\
[1, 1, 1]]
\end{matrix}
$$
### Options

1. 1
Correct
The grid is composed of all cell 1s, which form one island. 
----------------------------

2. 0
Incorrect

----------------------------

3. 9
Incorrect

----------------------------

4. 3
Incorrect

----------------------------

---------------------------------------------

## Question 3
What is the output if the following grid is given as input?

$$ grid =
\begin{matrix}
[[1, 0, 0], \\
[1, 1, 1], \\
[1, 0, 1]]
\end{matrix}
$$
### Options

1. 1
Correct
All cell 1s are connected to each other, resulting in only one island.
----------------------------

2. 5
Incorrect

----------------------------

3. 4
Incorrect

----------------------------

4. 3
Incorrect

----------------------------

---------------------------------------------