Language Details: Kotlin

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Problems solved

Qualification Round (211 solutions by 42 contestants):
Round 1A (20 solutions by 8 contestants):
Round 1B (54 solutions by 19 contestants):
Round 1C (30 solutions by 10 contestants):
Round 2 (26 solutions by 9 contestants):
Round 3 (4 solutions by 1 contestant):

Submission Origin

Russia (14 contestants)
Belgium (4 contestants)
Poland (3 contestants)
Ukraine (3 contestants)
United States (3 contestants)
Canada (2 contestants)
France (2 contestants)
Germany (2 contestants)
United Kingdom (2 contestants)
Antarctica (1 contestant)
Brazil (1 contestant)
China (1 contestant)
Japan (1 contestant)
Lithuania (1 contestant)
Romania (1 contestant)
South Korea (1 contestant)
Spain (1 contestant)
Thailand (1 contestant)
Turkey (1 contestant)