Round 1A: Good Luck

1359 correct small sets and 31 correct large sets. View problem statement or contest analysis.

Compact solutions

Solved in...

C++ (893 sets)
Java (183 sets)
Python (179 sets)
C (30 sets)
C# (29 sets)
Ruby (18 sets)
Haskell (12 sets)
Pascal (8 sets)
Perl (5 sets)
Scala (5 sets)
OCaml (4 sets)
D (3 sets)
Go (2 sets)
PHP (2 sets)
R (2 sets)
Racket (2 sets)
Scheme (2 sets)
ActionScript (1 set)
AWK (1 set)
ECLiPSe (1 set)
Factor (1 set)
Fortran (1 set)
Lisp (1 set)
Lua (1 set)
MATLAB (1 set)
Visual Basic (1 set)
WRAPL (1 set)
Xtend (1 set)

Submission Origin

China (321 contestants)
United States (184 contestants)
Japan (108 contestants)
Russia (84 contestants)
India (82 contestants)
Taiwan (54 contestants)
Canada (43 contestants)
Brazil (34 contestants)
Australia (32 contestants)
South Korea (32 contestants)
Ukraine (25 contestants)
Bangladesh (18 contestants)
Hong Kong (18 contestants)
Indonesia (17 contestants)
Argentina (16 contestants)
France (15 contestants)
Poland (15 contestants)
Germany (14 contestants)
Slovakia (14 contestants)
Vietnam (14 contestants)
Thailand (13 contestants)
United Kingdom (13 contestants)
Egypt (12 contestants)
Singapore (12 contestants)
Belarus (9 contestants)
Bulgaria (9 contestants)
Netherlands (9 contestants)
New Zealand (8 contestants)
Venezuela (8 contestants)
Colombia (7 contestants)
Hungary (7 contestants)
Mexico (7 contestants)
Romania (7 contestants)
Spain (6 contestants)
Peru (5 contestants)
Portugal (5 contestants)
Turkey (5 contestants)
Greece (4 contestants)
Iran (4 contestants)
Serbia (4 contestants)
South Africa (4 contestants)
Austria (3 contestants)
Bolivia (3 contestants)
Czech Republic (3 contestants)
Finland (3 contestants)
Georgia (3 contestants)
Israel (3 contestants)
Lithuania (3 contestants)
Philippines (3 contestants)
Sweden (3 contestants)
Belgium (2 contestants)
Chile (2 contestants)
Croatia (2 contestants)
Italy (2 contestants)
Kazakhstan (2 contestants)
Kyrgyzstan (2 contestants)
Nepal (2 contestants)
North Korea (2 contestants)
Norway (2 contestants)
Slovenia (2 contestants)
Switzerland (2 contestants)
Armenia (1 contestant)
Denmark (1 contestant)
Ireland (1 contestant)
Jamaica (1 contestant)
Latvia (1 contestant)
Lebanon (1 contestant)
Moldova (1 contestant)
Mongolia (1 contestant)
Morocco (1 contestant)
Pakistan (1 contestant)
Sri Lanka (1 contestant)
Uruguay (1 contestant)
Western Sahara (1 contestant)