Juliusz Verne wrote story 80 days around the world. But since he wrote so our tech go way ahead. Therefore Idea come to my mind.
Is possible to poop in every country in less than 80 days?
Rules:
1. only public transport, based on historic time tables
2. you need poop on ground, any smart idea like poop in plane don't count.
3. let say you are able to poop as many times a day as needed.
Also I'm mostly interested in how to solve that puzzle not pure answer. My current approach show me only its NP hard problem, and i can't found time tables in computable format.