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Problems solved

Qualification Round (54766 solutions by 12074 contestants):
Round 1A (15885 solutions by 4693 contestants):
  • The Last Word: 4594 small solutions, 4444 large solutions.
  • Rank and File: 2487 small solutions, 2190 large solutions.
  • BFFs: 1250 small solutions, 920 large solutions.
Round 1B (11069 solutions by 3877 contestants):
Round 1C (8686 solutions by 3089 contestants):
Round 2 (6260 solutions by 1747 contestants):
Round 3 (1235 solutions by 317 contestants):
Final Round (74 solutions by 20 contestants):

Submission Origin

India (3276 contestants)
China (1475 contestants)
United States (824 contestants)
Russia (611 contestants)
South Korea (533 contestants)
Bangladesh (483 contestants)
Japan (404 contestants)
Brazil (332 contestants)
Taiwan (315 contestants)
Egypt (303 contestants)
Poland (229 contestants)
Canada (218 contestants)
Ukraine (217 contestants)
Vietnam (150 contestants)
Romania (148 contestants)
Thailand (146 contestants)
Indonesia (142 contestants)
France (126 contestants)
Germany (112 contestants)
Hong Kong (109 contestants)
Mexico (103 contestants)
Australia (100 contestants)
Iran (96 contestants)
Pakistan (91 contestants)
Belarus (87 contestants)
Singapore (85 contestants)
Argentina (82 contestants)
Spain (80 contestants)
Colombia (79 contestants)
Turkey (72 contestants)
Kazakhstan (71 contestants)
Hungary (69 contestants)
Peru (69 contestants)
Italy (64 contestants)
Slovakia (60 contestants)
United Kingdom (59 contestants)
Bolivia (53 contestants)
Bulgaria (49 contestants)
Czech Republic (45 contestants)
Netherlands (44 contestants)
Greece (38 contestants)
Sweden (37 contestants)
Switzerland (34 contestants)
Croatia (33 contestants)
Georgia (30 contestants)
Israel (29 contestants)
Tunisia (28 contestants)
Portugal (27 contestants)
? (26 contestants)
New Zealand (26 contestants)
Serbia (26 contestants)
Lithuania (22 contestants)
Morocco (21 contestants)
Venezuela (21 contestants)
Belgium (20 contestants)
Philippines (20 contestants)
Jordan (19 contestants)
Sri Lanka (19 contestants)
Armenia (18 contestants)
Finland (17 contestants)
South Africa (17 contestants)
Malaysia (16 contestants)
Uzbekistan (16 contestants)
Azerbaijan (15 contestants)
Denmark (15 contestants)
Latvia (14 contestants)
Moldova (14 contestants)
Slovenia (13 contestants)
Lebanon (12 contestants)
Turkmenistan (11 contestants)
Austria (10 contestants)
Mongolia (10 contestants)
Nepal (10 contestants)
Palestine (10 contestants)
Kyrgyzstan (9 contestants)
Estonia (8 contestants)
Iceland (8 contestants)
Norway (7 contestants)
Algeria (6 contestants)
Ireland (6 contestants)
Macau (6 contestants)
Tajikistan (6 contestants)
Chile (5 contestants)
Luxembourg (5 contestants)
Macedonia (5 contestants)
Syria (5 contestants)
Antarctica (4 contestants)
Benin (4 contestants)
Bosnia and Herzegovina (4 contestants)
Cameroon (4 contestants)
Cyprus (4 contestants)
Dominican Republic (4 contestants)
Afghanistan (3 contestants)
Albania (3 contestants)
Costa Rica (3 contestants)
Puerto Rico (3 contestants)
Ethiopia (2 contestants)
Namibia (2 contestants)
Nigeria (2 contestants)
Saudi Arabia (2 contestants)
Uruguay (2 contestants)
Andorra (1 contestant)
Angola (1 contestant)
Anguilla (1 contestant)
Burundi (1 contestant)
Cambodia (1 contestant)
Cayman Islands (1 contestant)
Ecuador (1 contestant)
Gabon (1 contestant)
Greenland (1 contestant)
Guinea (1 contestant)
Haiti (1 contestant)
Madagascar (1 contestant)
Mauritius (1 contestant)
Nicaragua (1 contestant)
Oman (1 contestant)
Rwanda (1 contestant)
Saint Barthélemy (1 contestant)
Senegal (1 contestant)
Sint Maarten (1 contestant)
Togo (1 contestant)
Trinidad and Tobago (1 contestant)
U.S. Minor Outlying Islands (1 contestant)
U.S. Virgin Islands (1 contestant)
United Arab Emirates (1 contestant)
Vatican City (1 contestant)
Zimbabwe (1 contestant)
Åland Islands (1 contestant)