# Convert 1D Array into 2D Array

In this lab, you will be tasked with converting a given **0-indexed** 1-dimensional (1D) integer array `original`

into a 2-dimensional (2D) array. You will be given two integers, `m`

and `n`

, representing the desired number of rows and columns, respectively, for the resulting 2D array. Your goal is to create a 2D array with `m`

rows and `n`

columns using **all** the elements from `original`

.

The elements from indices `0`

to `n - 1`

(**inclusive**) of `original`

should form the first row of the constructed 2D array, the elements from indices `n`

to `2 * n - 1`

(**inclusive**) should form the second row of the constructed 2D array, and so on.

Your function `construct2DArray`

should return an `m x n`

2D array constructed according to the above procedure, or an empty 2D array if it is impossible.

## Examples

**Example 1:**

**Input:** original = [1,2,3,4], m = 2, n = 2
**Output:** [[1,2],[3,4]]
**Explanation:** The constructed 2D array should contain 2 rows and 2 columns.
The first group of n = 2 elements in original, [1,2], becomes the first row in the constructed 2D array.
The second group of n = 2 elements in original, [3,4], becomes the second row in the constructed 2D array.

**Example 2:**

**Input:** original = [1,2,3], m = 1, n = 3
**Output:** [[1,2,3]]
**Explanation:** The constructed 2D array should contain 1 row and 3 columns.
Put all three elements in the original into the first row of the constructed 2D array.

**Example 3:**

**Input:** original = [1,2], m = 1, n = 1
**Output:** []
**Explanation:** There are 2 elements in the original.
It is impossible to fit 2 elements in a 1x1 2D array, so return an empty 2D array.

## Constraints

`1 <= original.length <= 5 * 104`

`1 <= original[i] <= 105`

`1 <= m, n <= 4 * 104`

Remember to export the `construct2DArray`

function so that it can be imported and tested in the evaluation script.

`export function construct2DArray(original, m, n) { // Your code here }`

Happy coding!