Louis Huemiller added the comment:
Reinstalled the server I'd been using for this issue, with Ubuntu 18.04.3 LTS
Server amd64. This installation already came with Python3.6.8. Downloaded and
installed Python3.7.3 and 3.8.0 from:
https://www.python.org/ftp/python/3.7.3/Python-3.7.
Louis Huemiller added the comment:
Thank you for looking into the potential issue. Instead of getting Python3.8
from ppa:deadsnakes/ppa, I downloaded the source from:
https://www.python.org/ftp/python/3.8.0/Python-3.8.0rc1.tgz
Then did the following to build and install it:
$ cd /usr
Louis Huemiller added the comment:
Each of the Python runs mentioned in the initial post took around 4 hours to
execute. Although not as accurate, the issue can be demonstrated in less than 5
minutes through the use of:
# If needed use the following to install Python3.8.0rc1
$ apt-get
Louis Huemiller added the comment:
Attached is a chart, which shows the results from the runs mentioned in the
initial post. This chart was produced through the use of:
../permutations2x2_chart_results \
-f ./20191011b_chart.svg \
C++unordered_map
New submission from Louis Huemiller :
Have created a program that by brute force determines all reachable states of a
2-by-2 MagicCube, sometimes referred to as a 2x2 Rubick's cube. On one of my
servers, which is described in the attached file 20191011b_configuration, this
program
