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Problems

Topics
Difficulty
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4642
Conveyor
Very hard
4643
News
4644
Lotto
4646
Cave
4647
Black-and-white cube
Very easy
4648
One-two
Very easy
4649
Optimal Cutting
Very easy
4650
Graph Tournament
Very hard
4651
A lock in the form of a mini-game
4652
Number of requests
4653
Two permutations
Hard
4654
Robot horse
Very hard
4655
Hop-skip
4656
Suffix tree
Very hard
4657
Suffix tree of two strings
Very hard
4658
Unique suffixes
Very hard
4659
Common Substring
Very easy
4660
Controlling set of rows
Medium
4661
Gold Mines
Very easy
4662
Chords
Hard
4663
A Coloring Game
4664
Hippopotamus
4665
False RSA
Very easy
4666
Circular Railway
Very hard
4667
SETI
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