It's place to solve interesting problems.
In 2015, I become an ACM ICPC World Champion and advanced to all onsite events of algorithmic competitions which I participated in (Topcoder Open, Google Code Jam, Facebook HackerCup).
Camping, playing board games, learning something new.
I started participating in Topcoder during my first year of studying at ITMO University. I failed all the problems during my first SRM. But since that moment a lot of time has passed. And I advanced to all Topcoder Open Algorithm onsite events in which I can participate (was >18 years old).