After publishing an interview with Keshav Dhandhania we have decided to continue this project and present you other successful Spoj users, who can share their experience and all wisdom gained during their struggle with Spoj problems. Today we present you Ivan Katanić a finalist in International Olympiad in Informatics a member of Croatian national team in computer contests and a long-time Spoj user with a #11th place in a world rank and almost 1000 solved problems.