You'll face this at + major companies: Amazon, Meta, Google, Microsoft, Apple, Bloomberg, Uber. You'll learn constraint-based pruning. Instead of generating everything and filtering, you avoid invalid paths entirely. Here's the pattern: track state (open/close counts) and only make valid moves. This applies to many constraint satisfaction problems.
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$ curl repovive.com/roadmaps/maang-interview-prep/backtracking/generate-parentheses-why-this-problem
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