board 16 16 B N N N N N N N N N N N N N N N W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C W C C C C C C C C C C C C C C C mirrors 1 15 15 / 0 robots 5 15 0 0 0 0 1 0 2 0 3 target 0 0 15 0 solution 3 move 0 1 0 move 0 1 15 move 0 0 15