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Problems
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Problems

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Difficulty
Sort by
2709
Palindrome
Easy
2718
Repetition
Medium
2728
Cipher
Hard
2736
ClosedCup
Medium
2757
User Names
Medium
2765
Suffix machine gun
Hard
2767
Square palindrome
Medium
2785
Game
Easy
2790
Damaged XML
Medium
2882
Period of words
Medium
2887
PreQueL
Hard
2912
Glass Beads
Very easy
2935
Dima and Percentages
Easy
2962
Substrings with Shift
Very hard
3009
Euphony
Medium
3024
Electronic Document Security
Very easy
3026
Rock Skipping
Easy
3036
Mutation
Easy
3045
Roll Call
Easy
3075
Minimal Matrix
Medium
3090
Universal Question Answering System
Hard
3100
Spelling Suggestion
Hard
3105
Grade School Multiplication
Hard
3116
Polly Wants a Cracker
Hard
3135
XML
Medium
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