Hello, I am Stefan and over the last 5 years, I have been a professional Olympiad, data structures and algorithms coach who has helped many students achieve top results at Olympiads and programming competitions such as IOI, USACO, ICPC, several National Olympiads and various other programming competitions, plus people who achieved their dream jobs at big tech companies and many other similar achievements.I graduated from the Faculty of Mathematics and Computer Science, University of Bucharest, after having been a member of the Olympics' class. Ever since I discovered computer science I developed a passion which helped me become better and better, year by year, both during my Olympiad years and now, since I started teaching.Among other achievements, I taught people from over 20 countries and my educational resources have been watched over 150k times, which represent the proof that my output is of a high quality which is an essential prerequisite of academic and professional success.