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Problems solved

Qualification Round (25365 solutions by 6154 contestants):
Round 1A (5895 solutions by 2147 contestants):
  • The Last Word: 2134 small solutions, 1992 large solutions.
  • Rank and File: 762 small solutions, 701 large solutions.
  • BFFs: 190 small solutions, 116 large solutions.
Round 1B (3208 solutions by 1417 contestants):
Round 1C (2372 solutions by 1006 contestants):
Round 2 (713 solutions by 223 contestants):
Round 3 (112 solutions by 28 contestants):
Final Round (16 solutions by 3 contestants):

Submission Origin

India (1494 contestants)
United States (1236 contestants)
China (286 contestants)
Canada (192 contestants)
Russia (165 contestants)
Egypt (132 contestants)
Colombia (130 contestants)
South Korea (109 contestants)
France (107 contestants)
Ukraine (103 contestants)
Brazil (99 contestants)
Germany (95 contestants)
Japan (91 contestants)
Australia (87 contestants)
Singapore (80 contestants)
Spain (75 contestants)
Mexico (73 contestants)
Poland (72 contestants)
Taiwan (71 contestants)
Pakistan (70 contestants)
Indonesia (62 contestants)
Vietnam (58 contestants)
Hong Kong (52 contestants)
Romania (50 contestants)
United Kingdom (50 contestants)
Netherlands (48 contestants)
Italy (45 contestants)
Turkey (44 contestants)
Sri Lanka (42 contestants)
Bangladesh (41 contestants)
Nigeria (40 contestants)
New Zealand (38 contestants)
Thailand (37 contestants)
South Africa (36 contestants)
Tunisia (36 contestants)
Israel (35 contestants)
Sweden (34 contestants)
Belgium (33 contestants)
Belarus (30 contestants)
Greece (30 contestants)
Hungary (30 contestants)
Argentina (29 contestants)
Portugal (28 contestants)
Slovakia (26 contestants)
Morocco (24 contestants)
Cameroon (23 contestants)
Iran (22 contestants)
Bolivia (20 contestants)
Czech Republic (19 contestants)
Kazakhstan (17 contestants)
Philippines (17 contestants)
Venezuela (17 contestants)
Bulgaria (16 contestants)
Switzerland (16 contestants)
Austria (13 contestants)
Peru (13 contestants)
Palestine (12 contestants)
? (11 contestants)
Benin (11 contestants)
Chile (11 contestants)
Ireland (11 contestants)
Malaysia (11 contestants)
Uruguay (11 contestants)
Croatia (10 contestants)
Azerbaijan (9 contestants)
Estonia (9 contestants)
Macedonia (9 contestants)
Kenya (8 contestants)
Latvia (8 contestants)
Lebanon (8 contestants)
Norway (8 contestants)
Slovenia (8 contestants)
Algeria (7 contestants)
Denmark (7 contestants)
Kosovo (7 contestants)
Lithuania (7 contestants)
Nepal (7 contestants)
Albania (6 contestants)
Jordan (6 contestants)
Saudi Arabia (6 contestants)
Finland (5 contestants)
Georgia (5 contestants)
Uzbekistan (5 contestants)
Cambodia (4 contestants)
Costa Rica (4 contestants)
Ghana (4 contestants)
Guatemala (4 contestants)
Iceland (4 contestants)
Malta (4 contestants)
Moldova (4 contestants)
Dominican Republic (3 contestants)
Ecuador (3 contestants)
Ethiopia (3 contestants)
Serbia (3 contestants)
Syria (3 contestants)
United Arab Emirates (3 contestants)
Yemen (3 contestants)
Anguilla (2 contestants)
Armenia (2 contestants)
Guadeloupe (2 contestants)
Ivory Coast (2 contestants)
Kuwait (2 contestants)
Mongolia (2 contestants)
Senegal (2 contestants)
Togo (2 contestants)
Zimbabwe (2 contestants)
Andorra (1 contestant)
Antarctica (1 contestant)
Bhutan (1 contestant)
Botswana (1 contestant)
Congo (1 contestant)
Cuba (1 contestant)
French Polynesia (1 contestant)
Gabon (1 contestant)
Guinea (1 contestant)
Haiti (1 contestant)
Jamaica (1 contestant)
Kyrgyzstan (1 contestant)
Lesotho (1 contestant)
Marshall Islands (1 contestant)
Mauritius (1 contestant)
Montenegro (1 contestant)
Mozambique (1 contestant)
Namibia (1 contestant)
North Korea (1 contestant)
Oman (1 contestant)
Paraguay (1 contestant)
RĂ©union (1 contestant)
Tajikistan (1 contestant)
Tanzania (1 contestant)
Turkmenistan (1 contestant)
Zambia (1 contestant)