# Largest Square Submatrix

Given a two-dimensional integer `matrix`

, return the area of the largest square of `1`

s.

**Constraints**

`n, m ≤ 200`

where`n`

and`m`

are the number of rows and columns in`matrix`

https://binarysearch.com/problems/Largest-Square-Submatrix

## Examples

### Example 1

**Input**

- matrix =

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

**Output**

- answer =
`16`

**Explanation**

The bottom left square has a bigger area than the top right square.

## Leave a comment