Feature #3: Power Up the Station
Explore how to efficiently power up cellular base stations by modeling dial states as graph nodes. Understand applying BFS to find the minimum number of dial turns needed to reach a target state while avoiding dead states. This lesson guides you through simulating dial rotations, handling digit wrap-around, and optimizing your approach to solve the problem.
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Description
AT&T just acquired a cellular company in a small town that owns four base stations. The company they acquired owned vintage equipment with dials that must be rotated clockwise or counterclockwise by hand to power up the base stations. There’s one dial for each of the base stations. Each dial has numbers from 0 to 9 and does not stop at either extreme; this means you can rotate clockwise at 9 to go ...