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Grokking the Coding Interview Patterns in C++

Solution: Number of Spaces Cleaning Robot Cleaned

Explore how to solve a cleaning robot problem using matrix traversal, where the robot moves and rotates within a grid, cleaning spaces and stopping upon revisiting states. Learn how to represent visited states with bit manipulation and implement an efficient loop detection to determine the number of unique cleaned cells.

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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 ...