About Olympic -> Problems -> XIII OI 2005/2006
News  About Olympic About contest Problems I OI 1993/1994 II OI 1994/1995 III OI 1995/1996 IV OI 1996/1997 V OI 1997/1998 VI OI 1998/1999 VII OI 1999/2000 VIII OI 2000/2001 IX OI 2001/2002 X OI 2002/2003 XI OI 2003/2004 XII OI 2004/2005 XIII OI 2005/2006 XIV OI 2006/2007 XV OI 2007/2008 Problems archive  History of OI  OI books  National team  Olympic camps  Photo gallery  Links  SIO  MAIN	Problems - XIII OI 2005/2006 Stage I The Disks HTML Periods of Words HTML Professor Szu HTML Tetris 3D HTML Frogs HTML Stage II The Postman HTML Warehouse HTML Subway HTML The Invasion HTML Ploughing HTML Schools HTML Stage III Aesthetic Text PDF Crystal PDF Teddies PDF Palindromes PDF Dancing in Circles PDF Sophie PDF The problems are available at main.edu.pl. Print friendly version