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Problems
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Difficulty
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3934
Legion
Very easy
3936
Towers of Hanoi
Easy
3973
Double Dealing
4008
Binomial coefficients
Easy
4029
Hip To Be Square
Easy
4040
Factor Trees
Very easy
4043
Roses
Hard
4078
Drawing Marbles
4083
Number
4093
Radiation
Easy
4095
Ultimate Device
Medium
4124
Coffin Tiles
Very easy
4133
Farm and factory
Very easy
4141
Number submission
Very easy
4149
Interview at "Lights Out"
Medium
4168
A night in the Library
Very easy
4170
Mixing liquids
Medium
4192
Olympiad
Medium
4193
Yalynky
Easy
4194
Series of numbers
Medium
4196
Chocolate bars
Easy
4208
Degrees of two
Easy
4222
Counting Pixels
4238
Hypercubes
Very easy
4244
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