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Problems

Topics
Difficulty
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7391
Circle
Very easy
7392
Permutation
Very hard
7400
New Game
Easy
7401
Stepan's Friends
7402
Favorite game
Very easy
7403
Turn on the lamp
Easy
7404
Polygon
Medium
7405
Ice Cream
Easy
7406
Prime Numbers of the Kingdom of Erudite
Easy
7407
Sum of prime numbers
Medium
7408
New Year's Toys
Easy
7409
Division
Hard
7410
Route taxi
Very easy
7411
Equation for the 5-th class!
Very easy
7412
Crossword
Very easy
7413
Sum on a tree reversed
Easy
7414
A Simple Task
Medium
7415
White hats
Easy
7427
Lucky Primes
Easy
7429
Long Arithmetic
Medium
7430
A Pot of Honey
Easy
7431
Time to break the stairs
Easy
7432
Canonical Decomposition
Medium
7433
Number system
Very easy
7434
I love long division
Hard
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