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4280
Points diameter
Medium
4281
Inattention
Very easy
4282
Valentine's Day
Easy
4283
Stepan and pairs
Very easy
4284
Stepan's heritage
Medium
4285
Stepan's Candy Problem
Hard
4286
Arithmetic
4287
Stepan and Matches
Very easy
4288
Stepan's Task
Medium
4289
Fines
Medium
4290
Repair
Medium
4291
Dictionary
Very easy
4292
Texas hold 'em
Easy
4293
Median Tree
Easy
4294
Billiard
4295
Stack Maze
4296
Counting 1's
4297
Ancient Commemorative Monolith
4298
Magical Bridges
Easy
4299
Hashigo Sama
4300
Ancient Scrolls
4301
Toastmaster
Easy
4302
Football
4303
Guests from Tau Ceti
4304
Communication with the organizers
Very hard
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