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Problems

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Difficulty
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9021
Count the integers of the form 2^x * 3^y
Very easy
9024
Distribute candies among people
Medium
9055
Secret code
Easy
9064
Old man and chessboard
Very easy
9081
Game cards
Easy
9082
Game "15++"
Easy
9083
Preparing for battle
Medium
9085
Circle inscribed in a square (roundinsquare)
Medium
9098
XOR sum
Medium
9107
Don’t Split The Atom!
9108
Bobby Tables
Medium
9111
Airport Check-in
9114
DotA Quals
9395
Number of Divisors (Function)
Very easy
9397
"Short Cube"
Hard
9406
Professor and batteries
9412
GeoGame
Easy
9423
Price function - 1
9438
Folding
Very easy
9506
Arithmetic magic
9518
Accurate Movement
Very easy
9519
Bad Treap
9521
Double Palindrome
Medium
9531
Complex numbers: addition and subtraction
Hard
9533
Starting number in the sequence
Easy
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