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Grokking the Coding Interview Patterns in Python

Solution: Number of Spaces Cleaning Robot Cleaned

Explore how a cleaning robot navigates a 2D binary matrix, starting from the top-left corner and turning when encountering obstacles. Learn to track the robot's movement using bitwise operations and identify when it stops after revisiting a state, gaining skills valuable for coding interviews on matrix traversal and state management.

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Statement

You are given a 0-indexed 2D binary matrix, room, representing a room of size m×nm \times n. In this matrix, 00 represents an empty space, while 11 represents a space occupied by an object. The top-left corner of the room is always empty in all test ...