Correct Solutions by,
- Toshihiro Shimizu, Kawasaki, Japan
- Semih Zaman, Özel Enka Fen ve Teknoloji Lisesi, Kocaeli
- Vekin Pirna, University of Wisconsin-Madison, USA
- Evan Luff, Channel Vantage, Detroit, USA
- Magnus Jakobsson, Malmö University, Sweden
- Vedat Deveci, DMO İstanbul
- Serdar Hojayev, Dashoguz, Türkmenistan
- Tomas Jurik, Kosice, Slovakia
- Hasan Zubeyr Demir, Özel Çaglayan Fen Lisesi, Ankara
- Solution: http://www.fen.bilkent.edu.tr/~cvmath/Problem/1801a.pdf