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Problems

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Difficulty
Sort by
3653
Ambiguity by Fibonacci
Very easy
3661
Railway Tickets
Very easy
3665
K-angulation
Very hard
3666
Balancing the Matrix
Very hard
3686
How many are good?
Medium
3688
Simple coincidence
Hard
3689
Snake
Very hard
3699
Placement of Rooks
Medium
3706
Sequence
Easy
3710
Tree
Medium
3739
Mutants-2
Medium
3751
Growing Strings
Hard
3752
Hyperactive Girl
Hard
3759
Cube
Medium
3769
Railway Connection
Very easy
3778
Roller coaster fun
Very easy
3783
Treasure Diving
Very hard
3788
Province Region Competition Team Play
Hard
3789
Fly or not fly
Hard
3791
HaHa`s Morning
Medium
3793
Job!Job!Job!
Hard
3819
Processor
Easy
3846
Maximal Number of Divisors
Easy
3847
Miraculous Drug
Easy
3858
Collecting Bugs
Hard
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