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Brute force
Difficulty
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6
The vouchers
Easy
9
N-digit numbers
Easy
22
"Mirror prime" numbers
Easy
29
The level of palindrome
Very easy
50
The cut number
Easy
82
Catacombs
Medium
90
Gold, Food and Power
Medium
94
Primes’ Problem
Easy
122
Mountain routes
Very easy
128
Lucky tickets
Very easy
141
The minimal sum of digits
Very easy
146
Squares - 2
Very easy
163
Happy figures (RU)
Hard
169
Skyscrapers (RU)
Easy
176
Chieftain selection (RU)
Very easy
177
Poker (RU)
Very easy
192
Just Fibonacci
Very easy
194
Product of figures (RU)
Very easy
202
Cubes (RU)
Very easy
203
Cubes - 2 (RU)
Very easy
205
The first is not a palindrome (RU)
Easy
212
Fence Kopatycha (RU)
Hard
215
Compote harvesting (RU)
Very easy
241
Bog (RU)
Medium
242
Prime Number (RU)
Easy
1
2
3
4
5
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33