Human Resource Machine/Year 4

Instructions

Scrambler Handler

Grab the first TWO things from the INBOX and drop them into the OUTBOX in the reverse order. Repeat until the INBOX is empty.

You got a new command! Feel free to COPYTO wherever you like on the carpet. It will be cleaned later.

Strategy

This year, to go along with COPY FROM, you get a new instruction: COPYTO

COPYTO

This instruction is always accompanied by a number. The instruction tells the worker to walk over to the box on the floor labeled with the specified number, and place a copy of the value in his/her hands into that box. Note that you cannot instruct the worker to COPYTO a box if he/she is not holding anything.

The IN conveyor is working again. Now they want you to take a pair of items off the IN conveyor, and place them on the OUT conveyor in reverse order. So if the first two items on the IN conveyor are 4, and then 5, they want you to place the 5 down on the OUT conveyor first, followed by the 4.

In order to do this, you're going to need to take advantage of the space on the floor. There are three empty boxes for you to use. You can place something in them for temporary storage, and retrieve them later on. Remember that the worker's limitation is that he cannot hold more than one item at a time. So he needs to store the first item he picks up from the IN conveyor somewhere so that he can pick it back up after he's dropped the second item off on the OUT conveyor. Box 0 is just as good as any.

a:
   INBOX   
   COPYTO   0
   INBOX   
   OUTBOX  
   COPYFROM 0
   OUTBOX  
   JUMP     a

Optimizing

It is not possible to further optimize this solution.

Performance

Steps     Size      Speed
Goal        7         21
Reached     7         21