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n-puzzle's Introduction

HOW TO

  1. "source start.sh"
  2. python srcs/npuzzle.py [puzzle_file]

n-puzzle

The goal of this project is to solve the N-puzzle game using the A* search algorithm or one of its variants.

Example

X represents the empty cell

start position

5 2 9
3 X 1
8 7 4

final wanted position

1 2 3
8 X 4
7 6 5

Beginning

You start with a square board made up of N*N cells. One of these cells will be empty, the others will contain numbers, starting from 1, that will be unique in this instance of the puzzle.

Your search algorithm will have to find a valid sequence of moves in order to reach the final state, a.k.a the "snail solution", which depends on the size of the puzzle.

notes

Greedy A* is described here https://en.wikipedia.org/wiki/A*_search_algorithm#Relations_to_other_algorithms

n-puzzle's People

Watchers

James Cloos avatar Jacob Quentin avatar

n-puzzle's Issues

INPUT - Map parsing from file

A valid file map must:

  • have its first line containing the width of the puzzle
  • be squared
  • contain all numbers from 0 to (N*N) - 1

It can contain one-line comments beginning by #
It can contain different type of white-spaces

# i'm a comment
4
0 10 5 7
11 14 4 8 #i'm another comment
1 2 6 13
12 3 15 9

OUTPUT

Program must show:

  • If the puzzle is solvable
  • The detail of all sequences made to the resolution
  • How much sequences needed to resolve
  • How much states envisaged through the entire program lifetime
  • How much states envisaged at maximum for one sequence

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