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Problems

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Difficulty
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4249
God Create Math
Very easy
4253
TianWang`s Game
Very hard
4263
30 chairs
Very easy
4271
Parencedence!
Easy
4283
Stepan and pairs
Very easy
4285
Stepan's Candy Problem
Hard
4296
Counting 1`s
4306
Sets
Easy
4318
Discrete Logarithm
Easy
4335
Feather on the Shaman's Head
4341
Aztec Treasure
Hard
4343
Flags for Provinces
4347
Salary for Robots
Very easy
4354
The problem about the chest
Medium
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
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