Language Details: Kotlin

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Problems solved

Qualification Round (116 solutions by 21 contestants):
Round 1A (19 solutions by 6 contestants):
Round 1B (27 solutions by 10 contestants):
Round 1C (14 solutions by 5 contestants):
Round 2 (7 solutions by 3 contestants):

Submission Origin

Russia (5 contestants)
United States (4 contestants)
Canada (2 contestants)
China (2 contestants)
Germany (2 contestants)
Belgium (1 contestant)
Japan (1 contestant)
Lithuania (1 contestant)
Poland (1 contestant)
Slovakia (1 contestant)
South Korea (1 contestant)
Spain (1 contestant)
Ukraine (1 contestant)