DIY: Open Lock
Explore how to determine the minimum number of wheel turns needed to open a lock with four rotating wheels, avoiding deadend states. Learn to model the problem, apply breadth-first search, and handle constraints to develop efficient solutions. This lesson helps you master practical problem-solving techniques used in coding interviews.
We'll cover the following...
We'll cover the following...
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 ...