Congratulations for the win. Can you share your approaches for the problems?

In my team I worked on "Interstellar", but I was unbelievably unsuccessful in coming up with any competitive approaches :) I mainly tried to select a random subset of planets initially and focus on them (the hope was that the other players would be less likely to try to out-buy my shares on these planets). I selected these planets as disjoint collections of long-ish paths (with the condition that they had at least some minimal amount of local income). Then I would place my traders also on disjoint collections of paths, in a greedy manner (repeatedly selecting the path which gave the best output divided by the number of traders used in it — hopefully I implemented the formulas correctly, but I'm not 100% sure of this). I noticed that this strategy brought some strong starts in some of the games (on server 1 I could get even up to 15% of the total income in the first 50-100 turns, but I would drop to 3%-4% by the end), but was usually very poor on server 2. And I didn't have a good strategy in estimating if/when I should buy new shares (I would sometimes buy some shares which didn't bring enough benefit by the end, so buying them ended up being just a waste of money).