The Mental Shortcut for Mastering Graph Traversal
Struggling with Graph Traversal? Here is the no-BS guide to understanding it, complete with real-world examples and study shortcuts.
Are you consistently losing points on Graph Traversal because of forgetting to mark nodes as 'visited'? If so, you're making the exact same error as 80% of your class.
The Contrast Technique
To build your intuition, contrast a failure against a success.
Failure: forgetting to mark nodes as 'visited'.
Success: In a Depth-First Search on a cyclic graph, if you don't keep a 'visited' set, your code will bounce between nodes in an infinite loop..
By comparing the two, the shortcut becomes obvious. You aren't doing less work; you are doing more efficient work.
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