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Problems

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Difficulty
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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
4680
Divisors
Easy
4715
Lovely Elephants
Very easy
4725
Sum of squares
Very easy
4733
Is it divisible by 2, 4 and 8?
Very easy
4734
Is it divisible by 3, 6 and 9?
Very easy
4743
The Journey of Nils with Wild Geese
Very easy
4752
Cinema
Very easy
4756
The Last Digit
Easy
4810
Генератор псевдослучайных чисел
Easy
4811
System of linear equations
Very hard
4812
Function
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