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For Beginners
Difficulty
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9949
The number of even n-digit numbers is 4
Easy
9952
The number of perfect squares is 2.
Very easy
9963
Length of the segment
9965
Sequence 2
Very easy
9966
Sequence 3
Very easy
9987
Two-digit numbers 3
11332
Online lesson
Very easy
11333
Square
Very easy
11470
Важлива задача - 2!
Very easy
11474
Важлива задача - 3!
Very easy
11477
Узвар
Easy
11478
Алея з ліхтарями
Medium
11481
Важлива задача - 5!
Very easy
11482
Complete to 9
Easy
11484
Чотиризначне із тризначного
Easy
11486
Количество натуральных
Easy
11638
Big sorting
Easy
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