To increase the security levels of the prison, one day the jailer of the prison thought to design a system,
through which he can access the prison cells , through a password only which he knows. Now thinking
you are the jailer, design a system (circuit) through which only you can open and close the prison cell
with a unique password assigned to each prison cell.
Dr. Jack Dawkins wants to design a robot able to follow an illuminated path that leads to a
mysterious cave in the forests of Sikara where an important element lies for his research. It
would be better if the robot reaches there in minimum time because he is not the only one