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875 challenges 536 easy 303 medium 36 hard

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Matrix & 2D Arrays medium

Spiral Matrix Order

Given a 2D matrix, return all elements in clockwise spiral order starting from the top-left.

matrix spiral traversal

Matrix & 2D Arrays medium

Spiral Matrix Traversal

Implement a function that returns the elements of a 2D matrix in clockwise spiral order.

matrix traversal simulation

Matrix & 2D Arrays medium

Matrix Block Sum

Given a 2D matrix and a block size, compute the sum of each block centered at every cell.

matrix prefix-sum 2d-array

Matrix & 2D Arrays medium

Rotate Matrix Layers

Given a square matrix, rotate each concentric layer 90 degrees clockwise.

matrix rotation in-place

Showing 4 challenges · medium · Matrix & 2D Arrays

Matrix & 2D Arrays — Python coding challenges

What you will find here

This page lists matrix & 2d arrays challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

Challenges vs tutorials and quizzes

Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.