Correct Solutions by,
- Toshihiro Shimizu Kawasaki, Japan
- Mehmet Sarak İstanbul Bahçeşehir Fen ve Teknoloji Lisesi
- Mahmut Sait Okyay University of California Riverside, USA
- Seung-Ri Park South Korea
- Henrik Aberg Gothenburg, Sweden
- Choi Min Kyu South Korea
- Cüneyd Öztürk Northwestern University USA
- Haruhisa Oda Tokyo, Japan
- Altuğ Beyhan YÖK TEBİP
- Richard Blatirmor Spain
- Murat Apaydın Bilkent alumnus
- Hasan Zübeyr Demir Ankara
- Ece Özüduru Urla, İzmir
- Tan Özalp METU
- Kipp Johnson Valley Catholic School Beaverton, Oregon, USA
- Roger Bengtsson Lund, Sweden
- Anıl Taş Frankfurt, Germany
- Abdulkadir Tanrıverdi Eskişehir
- Mustafa Burak Topal İstanbul
- Magnus Jakobsson Lund, Sweden
- Serdar Hojayev Dashoguz, Turkmenistan
- Ananda Raidu Bangalore, India
Solution: http://www.fen.bilkent.edu.tr/~cvmath/Problem/2209a.pdf