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Problems

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Difficulty
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16
Dragon
Easy
28
Product
Medium
35
Triangles from Matches
Medium
36
Gorynych the Dragon
Easy
50
The cut number
Easy
51
The Cost of the K-dominoes
Very easy
55
The presents to the 8th of March
Easy
58
The Billiards
Very easy
62
The Factorial
Easy
63
Anfisa and the flowers
Very easy
67
Cheese for Anfisa - 2
Very easy
71
The Expression from the Numbers
Very easy
94
Primes’ Problem
Easy
97
Bell numbers
Very easy
99
Lines
Hard
109
Page numbering
Very easy
111
Clocks
Easy
112
Cake
Very easy
114
Escape from Prison
Hard
116
Long number
Easy
117
Raft
Very easy
119
Degree of two
Medium
123
Number of zeroes in factorial
Very easy
127
Bucks in the Bank
Easy
132
Broken
Medium
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