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Problems

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Difficulty
Sort by
2179
Palindromic Subsequence
Medium
2190
Chain of words
Very easy
2191
Dialogs on UCM
Very easy
2192
Nothing was lost
Easy
2193
Lines
Very easy
2194
Palindrome Number
Very easy
2195
Spell check
Medium
2197
Antipalindrome
Easy
2198
Lines
Very easy
2199
Cyclic k-extension
Medium
2200
Words
Easy
2207
Electric train
Very easy
2215
Foreign Languages
Easy
2236
Let's play "Scramb"!
Hard
2246
Superstring
Easy
2301
A Needle in the Haystack
Very easy
2331
Balance of parentheses
Very easy
2337
Oh, these brackets
Hard
2354
Common Substring
Medium
2355
Nenokku
Easy
2356
Substrings
Medium
2410
Word Game
Easy
2451
High Score
Very easy
2459
Winnie-the-Pooh's Anniversary
Very easy
2460
Suffix path
Easy
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