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819 challenges 506 easy 280 medium 33 hard

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Matrix & 2D Arrays medium

01 Matrix Nearest Zero

Given a binary matrix, return a matrix of the same shape where each cell contains the Manhattan distance to the nearest 0.

matrix bfs distance

Matrix & 2D Arrays medium

Number of Islands in a Matrix

Count the number of distinct islands (connected groups of 1s) in a 2D binary matrix.

Matrix & 2D Arrays medium

Shortest Path in Binary Matrix

Compute the shortest path length from top-left to bottom-right in a binary matrix using 8-directional moves.

matrix bfs shortest-path

Matrix & 2D Arrays medium

Count square submatrices with all ones

Count all square submatrices consisting entirely of 1s in a binary matrix.

matrix dynamic-programming counting

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.