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Problems

Strings
Difficulty
Sort by
2803
MarkErovani cubes
2814
Fast Exponentiation
2882
Period of words
Medium
2912
Glass Beads
Very easy
2935
Dima and Percentages
Easy
2962
Substrings with Shift
Very hard
3009
Euphony
Medium
3020
The Seven Percent Solution
3024
Electronic Document Security
Very easy
3036
Mutation
Easy
3075
Minimal Matrix
Medium
3135
XML
3150
Equation
Easy
3181
Regular expressions (Easy)
Very easy
3182
Regular expressions (Hard)
Hard
3199
Confusing Login Names
3209
Palindrome
Very easy
3285
Kth Sentence
Easy
3345
Period
3371
A Smart Brain is a Tasty Brain
Easy
3382
Hidden Code
3430
The Sorcerer`s Donut
3571
Bracelets
Easy
3596
Revenge of Champernowne Constant
Very easy
3597
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