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Problems
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Difficulty
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8650
Crystal (Unknown)
Medium
8654
Integer multiplication
Very easy
8655
A Simple Sum
Medium
8658
Byte on the stairs
Easy
8659
Byte and Chess
Very easy
8660
Tile
Medium
8661
Credit
Very easy
8663
Multiplication Problem
Easy
8664
Charity work
Medium
8669
All divisors
Easy
8671
Representable with sum of squares
Very easy
8672
Square root
Very easy
8673
Equation - 1
Easy
8676
Express As The Sum
Easy
8678
Birches
Easy
8683
The sum of products of digits
Very easy
8689
Function - 4
Very easy
8690
Function - 5
Very easy
8706
Concatenated Numbers
Hard
8717
Torus Travel
Hard
8747
Sum divisibility
Very easy
8753
Авіашляхи Потоколяндії
Easy
8756
F. Kozak Vus and the Candies
Easy
8767
Candies
Very easy
8788
Coins
Very easy
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