Correct Solutions by,
- Toshihiro Shimizu Kawasaki, Japan
- Magnus Jakobsson Lund, Sweden
- Jepbar Asgarov Hitrowka, Turkmenistan
- Muhammed İkbal Ulvi Boğaziçi University
- Roger Bengtsson Lund, Sweden
- Alp Eren Köken Yusuf Ziya Öner Fen Lisesi, Antalya
- Kadyr Annabayev Turkmen State Institute of Architecture and Construction, Ashkabat
- Serdar Hojayev Dashoguz, Turkmenistan
- Steffen Weber Ismaning, Germany
Solution: http://www.fen.bilkent.edu.tr/~cvmath/Problem/2104a.pdf