propeller.problems.PSB2.fuel-cost

===========  PROBLEM DESCRIPTION  =========================
FUEL COST from PSB2
Given a vector of positive integers, divide
each by 3, round the result down to the nearest integer, and
subtract 2. Return the sum of all of the new integers in the
vector

Source: https://arxiv.org/pdf/2106.06086.pdf
============================================================

-main

(-main & args)
Runs propel-gp, giving it a map of arguments.

error-function

(error-function argmap data individual)
Finds the behaviors and errors of an individual: Error is 0 if the value and
the program's selected behavior match, or 1 if they differ, or 1000000 if no
behavior is produced. The behavior is here defined as the final top item on
the INTEGER stack.

instructions

stack-specific instructions, input instructions, close, and constants

random-int

(random-int)
Random integer between -100 and 100

train-and-test-data