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Problems

Combinatorics
Difficulty
Sort by
17
Gardener-painter
Easy
30
Certification
Medium
65
The Candies
Hard
105
Sets in a four-partite graph
Very hard
124
Square
Easy
201
Circles - 2
Very easy
230
Brackets parade
Very easy
236
Triomino
Very easy
239
Triangles
Easy
318
Binomial coefficients 1
Easy
321
Binomial coefficients 4
Medium
322
Binomial coefficients 5
Hard
364
Dictionary
Easy
376
The Computer Game
Very hard
390
Anagrams
Very easy
398
Cake for Sergei
Very easy
399
The consequences of influenza in Prostokvashino
Very easy
400
The Travels of the Gnomes
Easy
402
Complete Tree Labeling
Medium
448
Chords
Hard
466
Memory
Easy
472
Probability
Very easy
566
Letter of postman Pechkin
Very easy
643
Triangular Room
Easy
678
Employees
Easy
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