Round 1A: Crossing the Road

213 correct small sets and 172 correct large sets. View problem statement or contest analysis.

Compact solutions

Solved in...

C++ (265 sets)
Java (57 sets)
Python (25 sets)
C# (17 sets)
C (10 sets)
Pascal (4 sets)
Haskell (3 sets)
Perl (2 sets)
PHP (2 sets)

Submission Origin

United States (49 contestants)
China (46 contestants)
Russia (20 contestants)
Canada (13 contestants)
Japan (12 contestants)
Poland (8 contestants)
South Korea (8 contestants)
Brazil (5 contestants)
United Kingdom (5 contestants)
Hong Kong (4 contestants)
India (4 contestants)
Argentina (3 contestants)
Australia (3 contestants)
Indonesia (3 contestants)
Taiwan (3 contestants)
Austria (2 contestants)
Belarus (2 contestants)
Egypt (2 contestants)
Portugal (2 contestants)
Ukraine (2 contestants)
Armenia (1 contestant)
Bangladesh (1 contestant)
Bolivia (1 contestant)
Bulgaria (1 contestant)
Finland (1 contestant)
Hungary (1 contestant)
Latvia (1 contestant)
Lithuania (1 contestant)
Netherlands (1 contestant)
New Zealand (1 contestant)
Norway (1 contestant)
Romania (1 contestant)
Slovakia (1 contestant)
Slovenia (1 contestant)
Spain (1 contestant)
Sri Lanka (1 contestant)
Thailand (1 contestant)