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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 hard difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Google.

What role is this question designed for?

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

Infection Spread on a Grid (Cellular Automaton)

Quick Overview

This question tests a candidate's ability to implement and optimize a synchronous cellular automaton simulation on a 2D grid, assessing proficiency in BFS-based propagation, state machine design, and incremental computation. It falls under algorithms and grid simulation, evaluating practical coding skill and the ability to handle progressively complex constraints including recovery delays, barriers, and early-termination fixed-point detection.

hard
Google
Coding & Algorithms
Software Engineer