DIY: Walls and Gates
Explore how to solve the Walls and Gates problem, where you update a 2D grid to reflect shortest distances from empty rooms to gates. This lesson helps you understand problem-solving techniques for grid-based challenges frequently asked in coding interviews at companies like Amazon. Gain confidence in applying breadth-first search and handling constraints in Swift.
We'll cover the following...
We'll cover the following...
Problem
You are given a grid represented by a 2D array named rooms. The grid represents rooms where a cell can either be a wall, a gate, or an empty space. The rooms are initialized with these three possible values.
| Values | Represents |
|---|---|
| A wall or an obstacle | |