Round 1B: The Next Number

2559 correct small sets and 1890 correct large sets. View problem statement or contest analysis.

Languages

C++ (2800 sets)
Java (673 sets)
Python (358 sets)
C# (223 sets)
C (139 sets)
Pascal (57 sets)
Ruby (47 sets)
Perl (45 sets)

Haskell (37 sets)
PHP (28 sets)
MATLAB (9 sets)
Visual Basic (8 sets)
Lisp (4 sets)
Scheme (4 sets)
D (2 sets)
F# (2 sets)

Factor (2 sets)
Lua (2 sets)
OCaml (2 sets)
ActionScript (1 set)
Clojure (1 set)
Javascript (1 set)
Scala (1 set)

China (390 contestants)
India (348 contestants)
Russia (268 contestants)
United States (158 contestants)
Poland (107 contestants)
Japan (97 contestants)
Ukraine (84 contestants)
Brazil (79 contestants)
South Korea (64 contestants)
Romania (59 contestants)
Taiwan (49 contestants)
Canada (42 contestants)
Belarus (37 contestants)
Indonesia (32 contestants)
Vietnam (32 contestants)
Argentina (31 contestants)
Bangladesh (31 contestants)
Germany (30 contestants)
Hungary (29 contestants)
Bulgaria (28 contestants)
Colombia (27 contestants)
France (26 contestants)
Thailand (26 contestants)
Spain (24 contestants)
Italy (23 contestants)
Netherlands (22 contestants)
Egypt (21 contestants)

Hong Kong (21 contestants)
Israel (21 contestants)
Slovakia (21 contestants)
South Africa (21 contestants)
United Kingdom (21 contestants)
Mexico (19 contestants)
Czech Republic (18 contestants)
Australia (15 contestants)
Lithuania (14 contestants)
Serbia (13 contestants)
Kazakhstan (12 contestants)
Peru (12 contestants)
Portugal (12 contestants)
Turkey (12 contestants)
Venezuela (12 contestants)
Armenia (9 contestants)
Latvia (9 contestants)
New Zealand (9 contestants)
Sweden (9 contestants)
Finland (8 contestants)
Singapore (8 contestants)
Estonia (7 contestants)
Denmark (6 contestants)
Moldova (6 contestants)
Austria (5 contestants)
Belgium (5 contestants)
Georgia (5 contestants)

Morocco (5 contestants)
Pakistan (5 contestants)
Bolivia (4 contestants)
Croatia (4 contestants)
Greece (4 contestants)
Iran (4 contestants)
Malaysia (4 contestants)
Slovenia (4 contestants)
Macedonia (3 contestants)
Sri Lanka (3 contestants)
Switzerland (3 contestants)
Bosnia and Herzegovina (2 contestants)
Dominican Republic (2 contestants)
Lebanon (2 contestants)
Norway (2 contestants)
Philippines (2 contestants)
Uruguay (2 contestants)
Algeria (1 contestant)
Cameroon (1 contestant)
Guatemala (1 contestant)
Ireland (1 contestant)
Kyrgyzstan (1 contestant)
Nepal (1 contestant)
Palestinian Territory (1 contestant)
St Vincent & Grenadines (1 contestant)
Sudan (1 contestant)
Uzbekistan (1 contestant)