At one time I could solve a simple version of that problem.
When I was much younger and much thinner.
I could solve it 27 years ago while getting my Masters.
Couldn't do it now if my life depended on it.
Of course I could do polar geographic plot (Maneuvering board) approximations in my head while I was driving ships in the Navy. I can still do it on paper but not in my head.
"Ceterum censeo Islam esse delendam."
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)