Adjacency List vs Matrix
Learn when to use each pattern and make the right choice in your coding interview.
Quick Answer
Use Adjacency List when the problem fits adjacency-list pattern
Use Adjacency Matrix when the problem fits adjacency-matrix pattern
Side-by-Side Comparison
Adjacency List
Best For
Various algorithmic problems
Time
Varies
Space
Varies
Adjacency Matrix
Best For
Various algorithmic problems
Time
Varies
Space
Varies
How to Decide
- Analyze the problem constraints
- Consider time/space trade-offs
- Look for pattern triggers
Practice Both Patterns
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