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Grokking the Coding Interview Patterns in JavaScript

Solution: Number of Spaces Cleaning Robot Cleaned

Understand how to simulate a cleaning robot navigating a binary matrix to count unique cleaned spaces. Explore the robot's movement rules, state tracking with bitwise operations, and when it stops, enabling efficient matrix traversal without extra space.

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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 ...