Messenger

data structures, hashing, implementation, string suffix structures, strings

Check Transcription

brute force, data structures, hashing, strings

Another Wine Tasting Event

combinatorics, constructive algorithms, math, strings

Compress String

dp, strings

DNA Evolution

data structures, strings

Letters Removing

data structures, strings

Vanya and Brackets

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

Mysterious Code

dp, strings

String Mark

combinatorics, math, strings

Maximum Questions

data structures, dp, strings

Hostname Aliases

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

Writing a Song

brute force, dp, strings

Smart Boy

dp, games, strings

Erase and Extend (Hard Version)

binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers

Palindrome Degree

hashing, strings

Kaavi and Magic Spell

dp, strings

Prefixes and Suffixes

constructive algorithms, strings, two pointers

Erase Subsequences

dp, strings

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Lexicographically Small Enough

brute force, data structures, greedy, strings

Kill Anton

brute force, constructive algorithms, data structures, math, strings

Test

hashing, strings

Om Nom and Necklace

hashing, string suffix structures, strings

Match & Catch

dp, string suffix structures, strings

The minimal unique substring

constructive algorithms, math, strings

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Three Religions

dp, implementation, strings

Prefix Function Queries

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

Dreamoon and Strings

dp, strings

Two Bracket Sequences

dp, strings, two pointers

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Short Code

data structures, dp, greedy, strings, trees

Swapping Characters

brute force, hashing, implementation, strings

Intellectual Inquiry

dp, greedy, strings

Abbreviation

dp, hashing, strings

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Huge Strings

bitmasks, brute force, dp, implementation, strings

Middle-Out

constructive algorithms, greedy, strings

Holiday Wall Ornaments

dp, strings

Fake News (medium)

constructive algorithms, strings

Representative Sampling

dp, sortings, strings

Suffix Subgroup

*special problem, strings

A Simple Task

data structures, sortings, strings

Anthem of Berland

dp, strings

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Enchanted Artifact

constructive algorithms, interactive, strings

Martian Strings

string suffix structures, strings

Isomorphic Strings

hashing, strings

Poman Numbers

bitmasks, greedy, math, strings

Lock Puzzle

constructive algorithms, implementation, strings

String Multiplication

dp, greedy, strings

Games on a CD

data structures, hashing, string suffix structures, strings

Ann and Half-Palindrome

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

Bracket Substring

dp, strings

Side Transmutations

combinatorics, strings

Matching Names

dfs and similar, strings, trees

Vasya and Templates

greedy, implementation, strings

Restore a Number

brute force, constructive algorithms, strings

Similar Words

dp, hashing, strings, trees

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

A Bit Similar

bitmasks, brute force, hashing, string suffix structures, strings, two pointers

You Are Given Some Strings...

brute force, string suffix structures, strings

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

Xor-Subsequence (hard version)

bitmasks, data structures, dp, strings, trees

String Set Queries

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

Chaotic Merge

combinatorics, dp, math, strings

Bracket Cost

binary search, data structures, divide and conquer, dp, greedy, strings

String Compression

dp, hashing, string suffix structures, strings

Forbidden Indices

dsu, string suffix structures, strings

Typical Party in Dorm

bitmasks, combinatorics, dp, strings

Acyclic Organic Compounds

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

Three strings

data structures, dsu, string suffix structures, strings

Morse Code

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

Sonya and Matrix Beauty

strings

Encoding

hashing, string suffix structures, strings

Comfortably Numb

bitmasks, data structures, divide and conquer, strings, trees

The Supersonic Rocket

geometry, hashing, strings

Refactoring

greedy, implementation, strings

Fibonacci Strings

strings

Kefa and Watch

data structures, hashing, strings

Frequency of String

hashing, string suffix structures, strings

Stringforces

binary search, bitmasks, brute force, dp, strings, two pointers

Rescue Niwen!

dp, greedy, string suffix structures, strings

Legen...

data structures, dp, matrices, strings

Reachable Strings

data structures, hashing, strings

Picking Strings

constructive algorithms, implementation, strings

Middle Duplication

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

Text Editor

brute force, dp, greedy, strings

Hossam and Range Minimum Query

binary search, bitmasks, data structures, hashing, probabilities, strings, trees

Peterson Polyglot

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

Marbles

hashing, strings

Alphabet Permutations

data structures, strings

Codeword

combinatorics, strings

DZY Loves Strings

binary search, hashing, strings, two pointers

String Transformation

hashing, strings

Wilbur and Strings

dfs and similar, dp, graphs, strings

Rotating Substrings

dp, strings

Palindrome Partition

binary search, brute force, data structures, dp, hashing, strings

Awesome Substrings

math, strings

Koala and Notebook

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