bfs_1.py : representation 1
bfs_2.py : representation 2
problem_file.py : contains the game
need numpy library to run

Domain is hardcoded in the file

grid coordinates system are shown in the report q1

the problem needs the coordinates of all 6 players 
first five are for general spaceships
6th coordinate is for main ship

if a player is missing its coordinates should be -1, -1
----> game.append([[x coordinates],[y coordinates]])