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Problems

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Difficulty
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4318
Discrete Logarithm
Easy
4319
A Task for a Sixth Grader
Very hard
4335
Feathers on the Shaman's Head
Very hard
4368
Triangular web
Very easy
4372
Reconstruction of the Web
Hard
4408
Choosing Numbers
Very hard
4482
In the country of Unlearned Lessons 2
Very easy
4561
Irreducible Polynomials High
Very easy
4562
Irreducible Polynomials Junior
Easy
4629
Hexagonal Routes
Hard
4643
News
Hard
4644
Lotto
Hard
4665
False RSA
Very easy
4736
Is it divisible by 11?
Easy
4742
Number of divisors
Easy
4744
Gears
Very easy
4753
Cinema+
Medium
4897
Polynomials
Medium
4902
Interval
Hard
4957
Sequence
Medium
4967
Vasya's Dad
Hard
4968
Photo
Very hard
5132
Mystery
Easy
5141
LCM Sum
Medium
5198
Modular Exponentiation
Very easy
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