Round 1A: Multi-base happiness

1955 correct small sets and 481 correct large sets. View problem statement or contest analysis.

Languages

C++ (1376 sets)
Java (471 sets)
Python (207 sets)
C# (142 sets)
C (55 sets)
Ruby (42 sets)
Perl (36 sets)
Pascal (31 sets)

PHP (22 sets)
Haskell (13 sets)
Scala (6 sets)
Scheme (6 sets)
Javascript (4 sets)
OCaml (4 sets)
Visual Basic (4 sets)
Lisp (3 sets)

F# (2 sets)
Groovy (2 sets)
MATLAB (2 sets)
Erlang (1 set)
Factor (1 set)
Shell (1 set)
Standard ML (1 set)

China (502 contestants)
United States (234 contestants)
India (140 contestants)
Japan (112 contestants)
Brazil (100 contestants)
Russia (89 contestants)
South Korea (64 contestants)
Taiwan (54 contestants)
Canada (46 contestants)
Poland (38 contestants)
Argentina (36 contestants)
Egypt (33 contestants)
Indonesia (29 contestants)
Australia (27 contestants)
Vietnam (23 contestants)
Ukraine (21 contestants)
Mexico (20 contestants)
Thailand (19 contestants)
Hong Kong (18 contestants)
Kazakhstan (18 contestants)
Hungary (16 contestants)
Romania (15 contestants)
Belarus (14 contestants)
Germany (14 contestants)
Italy (14 contestants)
Spain (14 contestants)
Colombia (13 contestants)
Bangladesh (11 contestants)
France (11 contestants)
Peru (11 contestants)

Slovakia (11 contestants)
Bulgaria (10 contestants)
Turkey (10 contestants)
Czech Republic (9 contestants)
Israel (7 contestants)
Lithuania (7 contestants)
New Zealand (7 contestants)
Portugal (7 contestants)
Sri Lanka (7 contestants)
Venezuela (7 contestants)
Netherlands (6 contestants)
Sweden (6 contestants)
United Kingdom (6 contestants)
Croatia (5 contestants)
Malaysia (5 contestants)
Moldova (5 contestants)
Estonia (4 contestants)
Lebanon (4 contestants)
Macedonia (4 contestants)
South Africa (4 contestants)
Switzerland (4 contestants)
Armenia (3 contestants)
Austria (3 contestants)
Belgium (3 contestants)
Finland (3 contestants)
Latvia (3 contestants)
Morocco (3 contestants)
Pakistan (3 contestants)
Singapore (3 contestants)
Chile (2 contestants)

Dominican Republic (2 contestants)
Greece (2 contestants)
Guatemala (2 contestants)
Kyrgyzstan (2 contestants)
Nepal (2 contestants)
Norway (2 contestants)
Palestinian Territory (2 contestants)
Philippines (2 contestants)
Serbia (2 contestants)
Uruguay (2 contestants)
Azerbaijan (1 contestant)
Bahrain (1 contestant)
Bosnia and Herzegovina (1 contestant)
Cuba (1 contestant)
Denmark (1 contestant)
Georgia (1 contestant)
Iceland (1 contestant)
Iran (1 contestant)
Madagascar (1 contestant)
Malta (1 contestant)
Mongolia (1 contestant)
Namibia (1 contestant)
Nigeria (1 contestant)
Rwanda (1 contestant)
Slovenia (1 contestant)
Syria (1 contestant)
U.S. Virgin Islands (1 contestant)
Uzbekistan (1 contestant)