Round 1A: Make it Smooth

509 correct small sets and 319 correct large sets. View problem statement or contest analysis.

Languages

C++ (682 sets)
Java (88 sets)
Python (20 sets)

C (13 sets)
Pascal (11 sets)
C# (6 sets)

Haskell (4 sets)
Perl (2 sets)
Ruby (2 sets)

China (181 contestants)
Russia (47 contestants)
Japan (31 contestants)
United States (29 contestants)
Taiwan (17 contestants)
Poland (16 contestants)
Brazil (15 contestants)
South Korea (15 contestants)
Ukraine (14 contestants)
Canada (11 contestants)
India (11 contestants)
Belarus (8 contestants)
Indonesia (8 contestants)
Argentina (7 contestants)
Bangladesh (6 contestants)
Hong Kong (6 contestants)
Vietnam (6 contestants)
Thailand (5 contestants)
Australia (4 contestants)

Colombia (4 contestants)
Egypt (4 contestants)
Israel (4 contestants)
Norway (4 contestants)
Singapore (4 contestants)
Bulgaria (3 contestants)
Georgia (3 contestants)
Latvia (3 contestants)
Netherlands (3 contestants)
Spain (3 contestants)
United Kingdom (3 contestants)
Austria (2 contestants)
France (2 contestants)
Germany (2 contestants)
Hungary (2 contestants)
Mexico (2 contestants)
New Zealand (2 contestants)
Romania (2 contestants)
Slovakia (2 contestants)

Sweden (2 contestants)
Armenia (1 contestant)
Bolivia (1 contestant)
Croatia (1 contestant)
Cuba (1 contestant)
Denmark (1 contestant)
Finland (1 contestant)
Iran (1 contestant)
Italy (1 contestant)
Kazakhstan (1 contestant)
Kyrgyzstan (1 contestant)
Lithuania (1 contestant)
Malaysia (1 contestant)
Peru (1 contestant)
Sri Lanka (1 contestant)
U.S. Virgin Islands (1 contestant)
Venezuela (1 contestant)