Nearest Bathroom to Each Desk (multi-source BFS grid)

Phone ScreenSnowflakeLast reported April 2026Low Frequency

Reported: 3× across candidate reports
First seen: March 2026
Last reported: April 2026
Reported outcome: mixed

Problem Overview

Given a 2D grid where cells are labeled B (Bathroom), D (Desk), or _ (empty space), find the shortest distance from each Desk cell to its nearest Bathroom cell. Movement is allowed in four directions (up,…

1 candidate-reported follow-up — the exact probes interviewers asked, with the trigger for each
The rest of the problem statement — full requirements, constraints, and edge cases
Approach and trade-offs — what passing candidates did, and the mistakes that sink people

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Verified Source

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Interviewer Follow-ups

The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.