World Finals: Ping Pong Balls

92 correct small sets and 18 correct large sets. View problem statement or contest analysis.

Compact solutions

Solved in...

C++ (84 sets)
Java (21 sets)
Python (2 sets)
C (1 set)
C# (1 set)
Haskell (1 set)

Submission Origin

China (18 contestants)
Russia (18 contestants)
United States (14 contestants)
Japan (8 contestants)
Poland (6 contestants)
Ukraine (5 contestants)
Argentina (2 contestants)
Belarus (2 contestants)
Hong Kong (2 contestants)
Netherlands (2 contestants)
South Korea (2 contestants)
Sweden (2 contestants)
United Kingdom (2 contestants)
Australia (1 contestant)
Bulgaria (1 contestant)
Canada (1 contestant)
India (1 contestant)
Italy (1 contestant)
Lithuania (1 contestant)
Mexico (1 contestant)
Romania (1 contestant)
Singapore (1 contestant)