Day 319

[vaskoz]

Good morning! Here's your coding interview problem for today.

This problem was asked by Airbnb.

An 8-puzzle is a game played on a 3 x 3 board of tiles, with the ninth tile missing. The remaining tiles are labeled 1 through 8 but shuffled randomly. Tiles may slide horizontally or vertically into an empty space, but may not be removed from the board.

Design a class to represent the board, and find a series of steps to bring the board to the state [[1, 2, 3], [4, 5, 6], [7, 8, None]].