# Rotate by 90 Degrees Counter-Clockwise

Given a two-dimensional square `matrix`

, rotate in-place it 90 degrees counter-clockwise.

**Constraints**

`n = m ≤ 250`

where`n`

and`m`

are the number of rows and columns in`matrix`

https://binarysearch.com/problems/Rotate-by-90-Degrees-Counter-Clockwise

## Examples

### Example 1

**Input**

- matrix =

```
[[1,2,3],
[4,5,6],
[7,8,9]]
```

**Output**

- answer =
`[[3, 6, 9], [2, 5, 8], [1, 4, 7]]`

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