You are a bell boy in a stressful 3 story office building and the elevator’s circuits are fried. As the bell boy, it is not your job to operate the lifts manually, and maintain the peace within the lobbies.
The stress and tentions within the building are so high, that if two employees bump into each other with yell no-doubt argue and start a fight. This is a strike upon your record. Three strikes and you are fired.
The employees of the building have been instructed to tell you which floor they wish to exit on. A single up/down arrow means the employee wishes to go down one floor. A double arrow means that they wish to go down/up two floors.
If you leave an employee on the wrong floor, he will no-doubt complain. This is another strike on your record.
This game has ranked #3 in the PDRoms Coding Competition #3.666.