Problems - XIII OI 2005/2006

Stage I
The DisksHTML
Periods of WordsHTML
Professor SzuHTML
Tetris 3DHTML
FrogsHTML
Stage II
The PostmanHTML
WarehouseHTML
SubwayHTML
The InvasionHTML
PloughingHTML
SchoolsHTML
Stage III
Aesthetic TextPDF
CrystalPDF
TeddiesPDF
PalindromesPDF
Dancing in CirclesPDF
SophiePDF
The problems are available at main.edu.pl.