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Problems

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Difficulty
Sort by
6582
Blogger language
Very hard
6612
Zombdar
Medium
6620
False Sense of Security
Medium
6649
Playing Fair with Cryptography
Medium
6696
Eating Brains
Very hard
6743
A Secret Book
Very hard
6787
C(O|W|A*RD*|S)* CROSSWORD Puzzle
Very hard
6830
Doorman
Very easy
6835
Infiltration
Hard
6841
Optimal Keypad
Medium
6844
A DP Problem
Medium
6846
Balanced Chemical Equations
Hard
6862
Pseudographical recognizer
Medium
6898
Smart File Name Sorting
Medium
6901
Shuffling Strings
Easy
6907
Encrypted SMS
Very easy
6925
Contract Revision
Very easy
6932
Musical Plagiarism
Medium
6957
Nonogram
Easy
6975
Magic Multiple
Medium
7111
Terusky
Very easy
7199
Cryptogram
Very hard
7388
A Jaw-dropping Problem
Very easy
7440
Easy
Easy
7445
Palindrome
Very hard
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