I found the problems very cool! However, nobody is talking about it, so I decided to make a blog.

Tasks: https://boi2019.epy.gr/?p=747

Also, can someone post the scoreboard? I used to have a link http://147.102.38.13:8123/Ranking.html but the site died already...

How to do Roadtrip? It feels like doing a weird bfs storing a number of best paths in some form for each node, something like JOI Spring Camp 2017 Wild Boar