Practice Coding Question | Real Coding Interviews

Quick Summary

Model entity relationships as a directed graph to track permission flows.
Identify the single user who can reach every camera through ownership and group membership.
Use graph traversal to compute reachable entities per user and compare against the complete camera set.

What This Tests

Common Patterns

Graph TraversalBFSHashing

Hint 1

Hint 2

What Interviewers May Ask Next

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Python3

Test Cases

Input

permissions =

Output

Expected