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Problems solved

Qualification Round (2370 solutions by 831 contestants):
Round 1A (425 solutions by 153 contestants):
  • Mushroom Monster: 144 small solutions, 143 large solutions.
  • Haircut: 80 small solutions, 33 large solutions.
  • Logging: 19 small solutions, 6 large solutions.
Round 1B (154 solutions by 79 contestants):
Round 1C (301 solutions by 123 contestants):
Round 2 (134 solutions by 44 contestants):
Round 3 (15 solutions by 5 contestants):

Submission Origin

United States (109 contestants)
India (101 contestants)
United Kingdom (38 contestants)
Russia (34 contestants)
Japan (32 contestants)
France (27 contestants)
Poland (27 contestants)
Hungary (23 contestants)
Pakistan (23 contestants)
Iran (21 contestants)
Canada (20 contestants)
Italy (19 contestants)
Brazil (18 contestants)
Ukraine (17 contestants)
Israel (16 contestants)
Australia (15 contestants)
Thailand (15 contestants)
China (14 contestants)
Egypt (14 contestants)
Germany (14 contestants)
Romania (13 contestants)
South Africa (13 contestants)
Turkey (13 contestants)
South Korea (12 contestants)
Sri Lanka (12 contestants)
Czech Republic (10 contestants)
Argentina (9 contestants)
Spain (9 contestants)
Vietnam (9 contestants)
Belarus (8 contestants)
Hong Kong (8 contestants)
Lithuania (8 contestants)
Mexico (8 contestants)
Netherlands (7 contestants)
Guatemala (6 contestants)
Taiwan (6 contestants)
Indonesia (5 contestants)
Sweden (5 contestants)
Bulgaria (4 contestants)
Greece (4 contestants)
New Zealand (4 contestants)
Nigeria (4 contestants)
Portugal (4 contestants)
Switzerland (4 contestants)
Austria (3 contestants)
Belgium (3 contestants)
Denmark (3 contestants)
Jordan (3 contestants)
Slovakia (3 contestants)
Azerbaijan (2 contestants)
Bangladesh (2 contestants)
Bolivia (2 contestants)
Colombia (2 contestants)
Croatia (2 contestants)
Cyprus (2 contestants)
Kazakhstan (2 contestants)
Malaysia (2 contestants)
Mauritius (2 contestants)
Serbia (2 contestants)
Singapore (2 contestants)
Slovenia (2 contestants)
Venezuela (2 contestants)
American Samoa (1 contestant)
Bhutan (1 contestant)
Cuba (1 contestant)
Dominican Republic (1 contestant)
Ecuador (1 contestant)
Finland (1 contestant)
Guernsey (1 contestant)
Iceland (1 contestant)
Ireland (1 contestant)
Kyrgyzstan (1 contestant)
Latvia (1 contestant)
Lebanon (1 contestant)
Macau (1 contestant)
Macedonia (1 contestant)
Morocco (1 contestant)
Nepal (1 contestant)
North Korea (1 contestant)
Norway (1 contestant)
Philippines (1 contestant)
Saudi Arabia (1 contestant)
Tunisia (1 contestant)
United Arab Emirates (1 contestant)
Uruguay (1 contestant)
Uzbekistan (1 contestant)