Palindromifier

constructive algorithms, strings

ABBB

brute force, data structures, greedy, strings

String Reversal

data structures, greedy, strings

Minlexes

dp, greedy, implementation, strings

Number of Subsequences

combinatorics, dp, strings

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Balanced Bitstring

implementation, strings

Subsequences of Length Two

dp, strings

Juggling Letters

greedy, strings

x-prime Substrings

brute force, dfs and similar, dp, string suffix structures, strings

String Similarity

constructive algorithms, strings

Boboniu and Banknote Collection

strings

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

Common Prefixes

constructive algorithms, greedy, strings

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Acacius and String

brute force, implementation, strings

Prefix Flip (Hard Version)

constructive algorithms, data structures, implementation, strings, two pointers

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

Move Brackets

greedy, strings

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

AccurateLee

greedy, implementation, strings

Short Substrings

implementation, strings

Construct the String

data structures, dp, strings

Rotating Substrings

dp, strings

Subsequence Hate

implementation, strings

Spy-string

bitmasks, brute force, constructive algorithms, dp, hashing, strings

Phoenix and Distribution

constructive algorithms, greedy, sortings, strings

Binary Period

constructive algorithms, strings

Kaavi and Magic Spell

dp, strings

Elementary!

brute force, dp, strings

K-Complete Word

dfs and similar, dsu, greedy, implementation, strings

Prefix-Suffix Palindrome (Hard version)

binary search, greedy, hashing, string suffix structures, strings

Prefix-Suffix Palindrome (Easy version)

hashing, string suffix structures, strings

Yet Another Palindrome Problem

brute force, strings

String Modification

brute force, constructive algorithms, implementation, sortings, strings

Kuroni and Simple Strings

constructive algorithms, greedy, strings, two pointers

Remove Adjacent

brute force, constructive algorithms, greedy, strings

Reachable Strings

data structures, hashing, strings

Paint the String

*special problem, dp, strings

Homecoming

binary search, dp, greedy, strings

Au Pont Rouge

binary search, dp, strings

Concatenation with intersection

data structures, hashing, strings, two pointers

Cow and Message

brute force, dp, math, strings

Longest Palindrome

brute force, constructive algorithms, greedy, implementation, strings

Ayoub's function

binary search, combinatorics, greedy, math, strings

Three Strings

implementation, strings

Erase Subsequences

dp, strings

Erasing Zeroes

implementation, strings

Even But Not Even

greedy, math, strings

Irreducible Anagrams

binary search, constructive algorithms, data structures, strings, two pointers

Obtain The String

dp, greedy, strings

Infinite Prefixes

math, strings

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees

Fedya the Potter Strikes Back

data structures, strings

New Year and Naming

implementation, strings

Awesome Substrings

math, strings

Enchanted Artifact

constructive algorithms, interactive, strings

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Shuffle Hashing

brute force, implementation, strings

Two Bracket Sequences

dp, strings, two pointers

Lexicography

constructive algorithms, strings

Dominated Subarray

greedy, implementation, sortings, strings, two pointers

Character Swap (Hard Version)

strings

Character Swap (Easy Version)

strings

Equalizing Two Strings

constructive algorithms, sortings, strings

Binary Palindromes

greedy, strings

Broken Keyboard

brute force, strings, two pointers

Find String in a Grid

data structures, dp, strings, trees

AB-string

binary search, combinatorics, dp, strings

Strings Equalization

strings

Middle-Out

constructive algorithms, greedy, strings

Prefixes

strings

Substring Game in the Lesson

games, greedy, strings

Cards

implementation, sortings, strings

Periodic integer number

implementation, strings

Koala and Notebook

data structures, dfs and similar, graphs, shortest paths, strings, trees

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Unstable String Sort

data structures, dfs and similar, dsu, graphs, greedy, implementation, strings

Indie Album

data structures, dfs and similar, hashing, string suffix structures, strings, trees

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Kirk and a Binary String (easy version)

brute force, greedy, strings

Expected Value Again

combinatorics, strings

Compress Words

brute force, hashing, implementation, string suffix structures, strings

You Are Given Some Strings...

brute force, string suffix structures, strings

Print a 1337-string...

combinatorics, constructive algorithms, math, strings

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

Important Exam

implementation, strings

Archaeology

brute force, constructive algorithms, greedy, strings

WOW Factor

dp, strings

From S To T

implementation, strings

Keanu Reeves

strings

Letters Shop

binary search, implementation, strings

Subsequences (hard version)

dp, strings

Email from Polycarp

implementation, strings

Split a Number

greedy, implementation, strings

Beautiful Lyrics

data structures, greedy, strings

Plus from Picture

dfs and similar, implementation, strings

Minus and Minus Give Plus

*special problem, implementation, strings

Telephone Number

brute force, greedy, strings