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Decode the Coding Interview in Swift: Real-World Examples

DIY: Open Lock

Explore how to determine the minimum number of turns needed to unlock a four-wheel lock while avoiding deadends. Learn to implement an efficient algorithm in Swift to navigate through state spaces and optimize your solution for coding interviews.

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Problem statement

You have an old lock in front of you with four circular wheels. Each wheel has ten slots: '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'. The wheels can rotate freely and wrap around. For example, we can turn '9' to be '0' or '0' to be '9'. Each move consists of ...