Round 1A: Charging Chaos

3388 correct small sets and 1703 correct large sets. View problem statement or contest analysis.

Compact solutions

Solved in...

C++ (3071 sets)
Java (800 sets)
Python (747 sets)
C# (150 sets)
C (72 sets)
Ruby (60 sets)
Haskell (51 sets)
Perl (24 sets)
Scala (20 sets)
Go (12 sets)
PHP (12 sets)
OCaml (11 sets)
JavaScript (9 sets)
Visual Basic (8 sets)
MATLAB (6 sets)
Pascal (6 sets)
D (4 sets)
F# (4 sets)
Groovy (4 sets)
Kotlin (3 sets)
CoffeeScript (2 sets)
Lua (2 sets)
Racket (2 sets)
Dart (1 set)
Factor (1 set)
Julia (1 set)
Objective-C (1 set)

Submission Origin

China (737 contestants)
United States (459 contestants)
India (309 contestants)
Japan (229 contestants)
Russia (179 contestants)
Canada (123 contestants)
Taiwan (119 contestants)
Brazil (90 contestants)
Australia (76 contestants)
South Korea (69 contestants)
Poland (47 contestants)
Thailand (46 contestants)
Ukraine (46 contestants)
France (42 contestants)
Bangladesh (40 contestants)
Egypt (40 contestants)
Indonesia (37 contestants)
Argentina (35 contestants)
Vietnam (35 contestants)
Hong Kong (33 contestants)
Germany (32 contestants)
Belarus (29 contestants)
Singapore (28 contestants)
Israel (26 contestants)
Mexico (26 contestants)
Slovakia (26 contestants)
Spain (21 contestants)
Hungary (19 contestants)
United Kingdom (19 contestants)
Czech Republic (18 contestants)
Colombia (17 contestants)
Iran (17 contestants)
Romania (16 contestants)
Philippines (15 contestants)
Greece (14 contestants)
New Zealand (13 contestants)
Belgium (12 contestants)
Bolivia (12 contestants)
Bulgaria (12 contestants)
Portugal (11 contestants)
Sweden (11 contestants)
Croatia (10 contestants)
Kazakhstan (10 contestants)
Netherlands (10 contestants)
Finland (9 contestants)
Italy (8 contestants)
Peru (8 contestants)
Turkey (8 contestants)
Chile (7 contestants)
Pakistan (7 contestants)
Venezuela (7 contestants)
Austria (6 contestants)
Dominican Republic (6 contestants)
Lebanon (6 contestants)
Lithuania (6 contestants)
Georgia (5 contestants)
Serbia (5 contestants)
South Africa (5 contestants)
Denmark (4 contestants)
Jordan (4 contestants)
Kyrgyzstan (4 contestants)
Latvia (4 contestants)
Morocco (4 contestants)
Slovenia (4 contestants)
Sri Lanka (4 contestants)
Uzbekistan (4 contestants)
Armenia (3 contestants)
Iceland (3 contestants)
Ireland (3 contestants)
Malaysia (3 contestants)
North Korea (3 contestants)
Switzerland (3 contestants)
Costa Rica (2 contestants)
Norway (2 contestants)
Turkmenistan (2 contestants)
Afghanistan (1 contestant)
Antigua and Barbuda (1 contestant)
Azerbaijan (1 contestant)
Benin (1 contestant)
Brunei (1 contestant)
Cameroon (1 contestant)
Cuba (1 contestant)
Cyprus (1 contestant)
Estonia (1 contestant)
Ethiopia (1 contestant)
Guatemala (1 contestant)
Jamaica (1 contestant)
Luxembourg (1 contestant)
Macau (1 contestant)
Madagascar (1 contestant)
Martinique (1 contestant)
Mongolia (1 contestant)
Nicaragua (1 contestant)
Nigeria (1 contestant)
Rwanda (1 contestant)
Syria (1 contestant)
Tunisia (1 contestant)
Vatican City (1 contestant)
Zimbabwe (1 contestant)