Learn and practice the In-place Reversal of a Linked List, Stacks, and Matrices patterns to solve coding interview problems.

Educative-99 in Python: Accelerate Your Coding Interview Prep

Interviewers want to be sure that the candidate is comfortable manipulating linked lists, arrays, and data structures based on them, such as stacks and matrices. This module will provide the practice you need to review the concepts and techniques needed to solve common problems involving these data structures.

Basic Data Structures

# Statement

Given an $n \times n$ matrix, rotate the matrix 90 degrees clockwise. The performed rotation should be in place, i.e., the given matrix is modified directly without allocating another matrix. 

>**Note:** The function should only return the modified input matrix.

**Constraints:**

- `matrix.length` $=$ `matrix[i].length`
- $1 \leq$ `matrix.length` $\leq 20$
- $-10^3 \leq$ `matrix[i][j]` $\leq 10^3$

# Examples

Rotate Image

Statement