Round 1A: Rank and File

4532 correct small sets and 4041 correct large sets. View problem statement or contest analysis.

Compact solutions

Solved in...

C++ (4677 sets)
Python (1599 sets)
Java (1463 sets)
C# (209 sets)
C (158 sets)
Ruby (86 sets)
Haskell (53 sets)
Go (48 sets)
JavaScript (43 sets)
Scala (33 sets)
Perl (27 sets)
MATLAB (20 sets)
PHP (20 sets)
OCaml (19 sets)
Pascal (8 sets)
D (6 sets)
Groovy (6 sets)
Objective-C (6 sets)
Julia (5 sets)
Erlang (4 sets)
Kotlin (4 sets)
Lisp (4 sets)
Lua (4 sets)
Q (4 sets)
R (4 sets)
Scheme (4 sets)
Swift (4 sets)
CJam (3 sets)
CoffeeScript (3 sets)
Visual Basic (3 sets)
ActionScript (2 sets)
Clojure (2 sets)
Dart (2 sets)
Racket (2 sets)
Rust (2 sets)
Shell (2 sets)
TCL (2 sets)
TypeScript (2 sets)
Factor (1 set)
Picat (1 set)

Submission Origin

China (779 contestants)
United States (705 contestants)
India (681 contestants)
Japan (222 contestants)
Russia (178 contestants)
Taiwan (176 contestants)
South Korea (157 contestants)
Canada (151 contestants)
Brazil (128 contestants)
Australia (87 contestants)
France (81 contestants)
Vietnam (72 contestants)
Ukraine (69 contestants)
Bangladesh (64 contestants)
Singapore (64 contestants)
Hong Kong (52 contestants)
Poland (52 contestants)
Thailand (47 contestants)
Indonesia (44 contestants)
Germany (36 contestants)
Argentina (34 contestants)
Egypt (34 contestants)
Spain (33 contestants)
Iran (31 contestants)
Romania (27 contestants)
New Zealand (26 contestants)
Belarus (24 contestants)
Hungary (24 contestants)
Kazakhstan (21 contestants)
United Kingdom (20 contestants)
Mexico (19 contestants)
Slovakia (19 contestants)
Turkey (17 contestants)
Israel (16 contestants)
Italy (15 contestants)
Colombia (14 contestants)
Greece (14 contestants)
Peru (13 contestants)
South Africa (13 contestants)
Sweden (13 contestants)
Bolivia (12 contestants)
Czech Republic (12 contestants)
Portugal (12 contestants)
Switzerland (12 contestants)
Belgium (11 contestants)
Bulgaria (11 contestants)
Lithuania (11 contestants)
Netherlands (11 contestants)
? (8 contestants)
Croatia (8 contestants)
Georgia (8 contestants)
Pakistan (7 contestants)
Philippines (7 contestants)
Chile (6 contestants)
Finland (6 contestants)
Serbia (6 contestants)
Sri Lanka (6 contestants)
Venezuela (6 contestants)
Austria (5 contestants)
Malaysia (5 contestants)
Mongolia (5 contestants)
Nigeria (5 contestants)
Slovenia (5 contestants)
Denmark (4 contestants)
Iceland (4 contestants)
Latvia (4 contestants)
Moldova (4 contestants)
Norway (4 contestants)
Tunisia (4 contestants)
Armenia (3 contestants)
Azerbaijan (3 contestants)
Kyrgyzstan (3 contestants)
Lebanon (3 contestants)
Macedonia (3 contestants)
Morocco (3 contestants)
Algeria (2 contestants)
Cyprus (2 contestants)
Dominican Republic (2 contestants)
Estonia (2 contestants)
Guadeloupe (2 contestants)
Ireland (2 contestants)
Kenya (2 contestants)
Luxembourg (2 contestants)
Macau (2 contestants)
Nepal (2 contestants)
Benin (1 contestant)
Bosnia and Herzegovina (1 contestant)
Cambodia (1 contestant)
Cayman Islands (1 contestant)
Ethiopia (1 contestant)
Guinea (1 contestant)
Jamaica (1 contestant)
Jordan (1 contestant)
Kosovo (1 contestant)
Mozambique (1 contestant)
Panama (1 contestant)
Paraguay (1 contestant)
Syria (1 contestant)
Turkmenistan (1 contestant)
Uzbekistan (1 contestant)