Approach Summary
BFS on the 10,000-state space of 4-digit combinations. Each turn rotates one wheel by one step. Skip deadends.
How to Recognize This Pattern
- "Minimum turns to reach target combination"
- State-space BFS with 8 neighbours per state
Complexity Analysis
Time Complexity
O(10⁴ × D)
Space Complexity
O(10⁴)
Tags
Array Hash Table BFS