How do I practice coding and algorithm questions?

Use PracHub's coding console to write, test, and debug your solutions in Python or JavaScript. View hints, test against sample inputs, and compare with official solutions.

What difficulty level is this coding question?

This is a medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at OpenAI.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at OpenAI during technical interviews.

Spreading Contagion on a Grid | OpenAI Coding Question

Quick Overview

This question tests graph traversal and multi-source BFS on a 2D grid, evaluating a candidate's ability to model simultaneous state propagation across discrete time steps. It assesses graph reachability, connected-component analysis, and simulation under dynamic constraints — skills commonly probed in software engineering interviews to gauge algorithmic depth and practical coding fluency.

medium
OpenAI
Coding & Algorithms
Software Engineer

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