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Problems

Topics
Difficulty
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1988
The largest increasing subsequence
Easy
1989
Maximum matching
1990
Domino 2
Very easy
1991
Maximum flow
Very easy
1992
Dividing the graph
Easy
1993
Weighing
Very easy
1994
Brackets
Easy
1995
How can I help?
Very hard
1996
Cupcakes
Easy
1997
Approaching by progression
Very easy
1998
Tori
Easy
1999
Palindrome
Hard
2000
Minefield
Hard
2001
Device Survey
Very easy
2002
Pattern Coloring
Easy
2003
Cellular communication
Hard
2004
Routing
Very hard
2005
Weighing 2
2006
Plus and xor
Easy
2007
Gift
Medium
2008
Tourist
Medium
2009
Points
Easy
2010
Mice and Cheese
Easy
2011
Mutation
Medium
2012
Sequence
Very easy
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