Palindromic Magic

data structures, hashing, strings

Speckled Band

data structures, divide and conquer, hashing, string suffix structures, strings

Ж-function

string suffix structures, strings

Modest Substrings

dp, strings

Rap God

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

Cool Slogans

string suffix structures, strings

Cutting the Line

string suffix structures, strings

Reverses

dp, string suffix structures, strings

Digits of Number Pi

dp, implementation, strings

Puzzle Lover

dp, hashing, strings

Detect Robots

data structures, strings

Hongcow Masters the Cyclic Shift

strings, two pointers

Expected Value Again

combinatorics, strings

Birthday

graph matchings, strings

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Upside Down

data structures, string suffix structures, strings, trees

Moonwalk challenge

data structures, strings, trees

Appleman and a Game

binary search, shortest paths, strings

Duff is Mad

data structures, strings

Wrap Around

dp, strings

Speed Dial

dp, strings, trees

Mr. Kitayuta's Gift

combinatorics, dp, matrices, strings

Palindrome Partition

dp, string suffix structures, strings

Wilbur and Strings

dfs and similar, dp, graphs, strings

Substrings in a String

bitmasks, brute force, data structures, string suffix structures, strings

Palisection

strings

Mahmoud and Ehab and the final stage

data structures, strings

Fibonacci Suffix

strings

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings

Tree and XOR

strings, trees

Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

Mike and Friends

data structures, string suffix structures, strings, trees

e-Government

data structures, dfs and similar, dp, strings, trees

Two Prefixes

strings

AB-Strings

constructive algorithms, strings

Scissors

brute force, strings

Expensive Strings

string suffix structures, strings

Have You Ever Heard About the Word?

greedy, hashing, string suffix structures, strings

And Yet Another Bracket Sequence

data structures, greedy, hashing, string suffix structures, strings

Tricky and Clever Password

binary search, constructive algorithms, data structures, greedy, hashing, strings

Alphabet Permutations

data structures, strings

Rusty String

fft, math, strings

String Set Queries

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

Legen...

data structures, dp, matrices, strings

Cyclical Quest

data structures, string suffix structures, strings

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

Kefa and Watch

data structures, hashing, strings

Suffix Subgroup

*special problem, strings

Indie Album

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

The Next Good String

data structures, greedy, hashing, strings

Dreamoon and Binary

dp, strings

Mission Impassable

dp, strings

Two Permutations

data structures, hashing, strings

Koala and Notebook

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

Bracket Substring

dp, strings

Peterson Polyglot

brute force, dfs and similar, dsu, hashing, strings, trees

Marbles

hashing, strings

Dreamoon and Strings

dp, strings

A Simple Task

data structures, sortings, strings

String Transformation

hashing, strings

Vasya and Big Integers

binary search, data structures, dp, hashing, strings

Paper task

data structures, string suffix structures, strings

You Are Given Some Strings...

brute force, string suffix structures, strings

Vasya and Templates

greedy, implementation, strings

Short Code

data structures, dp, greedy, strings, trees

Lock Puzzle

constructive algorithms, implementation, strings

Picking Strings

constructive algorithms, implementation, strings

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Fibonacci Strings

matrices, strings

Representative Sampling

dp, sortings, strings

Fake News (medium)

constructive algorithms, strings

DZY Loves Strings

binary search, hashing, strings, two pointers

Sonya and Matrix Beauty

strings

Codeword

combinatorics, strings

Three strings

data structures, dsu, string suffix structures, strings

String Compression

dp, hashing, string suffix structures, strings

Abbreviation

dp, hashing, strings

The Supersonic Rocket

geometry, hashing, strings

Frequency of String

hashing, string suffix structures, strings

Encoding

hashing, string suffix structures, strings

Acyclic Organic Compounds

data structures, dfs and similar, dsu, hashing, strings, trees

Autocompletion

*special problem, strings, trees

Isomorphic Strings

hashing, strings

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Unstable String Sort

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

Fibonacci Strings

strings

Similar Words

dp, strings

Games on a CD

data structures, hashing, string suffix structures, strings

Forbidden Indices

dsu, string suffix structures, strings

Refactoring

greedy, implementation, strings

Anthem of Berland

dp, strings

Morse Code

binary search, data structures, dp, hashing, sortings, string suffix structures, strings

Matching Names

dfs and similar, strings, trees

Maximum Questions

data structures, dp, strings

String Mark

combinatorics, math, strings

Hostname Aliases

*special problem, binary search, data structures, implementation, sortings, strings

Jabber ID

implementation, strings

Test

hashing, strings

Vanya and Brackets

brute force, dp, expression parsing, greedy, implementation, strings

Obsessive String

dp, strings