Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in Go

Solution: Number of Spaces Cleaning Robot Cleaned

Explore how to simulate a cleaning robot's movement in a 2D binary room matrix. Learn to track the robot's position and direction using bitwise operations to count uniquely cleaned spaces before the robot revisits cells in the same direction, ensuring efficient path evaluation without extra space.

We'll cover the following...

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 ...