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Problems

Math
Difficulty
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4368
Triangular web
Very easy
4373
Quadratic equation
Very hard
4378
Very simple problem
Very hard
4408
Choosing Numbers
Very hard
4418
Lexicographical order
Medium
4459
The least common multiple
Easy
4475
Clock
Very easy
4501
Bit Equation
Easy
4502
Summer Internship
Very easy
4506
Pyrotechnician - 2
Very easy
4538
Bob and balls
Very easy
4539
Observant Vasya
Very easy
4556
Counting Triangles
Very easy
4561
Irreducible Polynomials High
Very easy
4565
High Fence Coloring
Very easy
4573
Quadratic Permutation High
Easy
4597
Embedded circles
Hard
4604
Lake
Easy
4606
Need for sum thing
Easy
4607
Open air
Very easy
4630
Towers
Medium
4648
One-two
Very easy
4654
Robot horse
Very hard
4665
False RSA
Very easy
4679
Mountain Holidays
Very easy
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