Correct Solutions by,
- Albert Stadler Herrliberg, Switzerland
- Emre Bektaş Boğaziçi University
- Vedat Deveci İstanbul
- Toshihiro Shimizu Kawasaki, Japan
- Omar Sonebi Lycee technique Settat, Casablanca, Morocco
- Abdulkadir Tanrıverdi Eskişehir
- Hamza Allaberdiyew
- Choi Min Kyu South Korea
- Ahmer Erçıkdı Ankara Fen Lisesi
- Roger Bengtsson Lund, Sweden
- Magnus Jakobsson Lund, Sweden
- Baran Devrim İzmir Konak Anadolu Lisesi
- Mustafa Burak Topal İstanbul
- Bahadır Berk Yılmaz TOBB University
- Recep Gökdereli
Solution: http://www.fen.bilkent.edu.tr/~cvmath/Problem/2207a.pdf