Speed Dial

dp, strings, trees

Palindromic Magic

data structures, hashing, strings

Sonya and Matrix Beauty

strings

Minimizing the String

greedy, strings

Diverse Substring

implementation, strings

Fibonacci Suffix

strings

Side Transmutations

combinatorics, strings

Oh Those Palindromes

constructive algorithms, strings

Detect Robots

data structures, strings

Check Transcription

brute force, data structures, hashing, strings

Tree and XOR

strings, trees

Refactoring

greedy, implementation, strings

Vasya and Big Integers

binary search, data structures, dp, hashing, strings

Vasya And Password

greedy, implementation, strings

Moonwalk challenge

data structures, strings, trees

Palindrome Pairs

hashing, strings

Speckled Band

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

Wrap Around

dp, strings

Equality

implementation, strings

Equalize

dp, greedy, strings

Many Equal Substrings

implementation, strings

Palindromic Twist

implementation, strings

Single Wildcard Pattern Matching

brute force, implementation, strings

The Supersonic Rocket

geometry, hashing, strings

Bracket Substring

dp, strings

AB-Strings

constructive algorithms, strings

Romaji

implementation, strings

Delete from the Left

brute force, implementation, strings

Abbreviation

dp, hashing, strings

A Tide of Riverscape

constructive algorithms, strings

A Blend of Springtime

implementation, strings

Substrings Sort

sortings, strings

Isomorphic Strings

hashing, strings

Antipalindrome

brute force, implementation, strings

Kuro and GCD and XOR and SUM

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

File Name

greedy, strings

Two-gram

implementation, strings

Aramic script

implementation, strings

Short Code

data structures, dp, greedy, strings, trees

Frequency of String

hashing, string suffix structures, strings

Death Stars (medium)

hashing, strings

Scissors

brute force, strings

String Typing

implementation, strings

String Transformation

greedy, strings

Phone Numbers

constructive algorithms, implementation, strings

Love Rescue

dfs and similar, dsu, graphs, greedy, strings

Lock Puzzle

constructive algorithms, implementation, strings

Palindrome Partition

dp, string suffix structures, strings

Game with String

implementation, probabilities, strings

Autocompletion

*special problem, strings, trees

Login Verification

*special problem, strings

Picking Strings

constructive algorithms, implementation, strings

Perfect Security

data structures, greedy, strings, trees

Radio Station

implementation, strings

Upside Down

data structures, string suffix structures, strings, trees

Substrings in a String

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

Reverses

dp, string suffix structures, strings

Shockers

implementation, strings

Swapping Characters

brute force, hashing, implementation, strings

Maximum Questions

data structures, dp, strings

Letters Removing

data structures, strings

Phone Numbers

implementation, strings

String Mark

combinatorics, math, strings

Palindromic Cut

brute force, implementation, strings

Field of Wonders

implementation, strings

Alex and broken contest

implementation, strings

Forbidden Indices

dsu, string suffix structures, strings

Huge Strings

bitmasks, brute force, dp, implementation, strings

Bark to Unlock

brute force, implementation, strings

Polycarp and Letters

brute force, implementation, strings

Mahmoud and Ehab and the final stage

data structures, strings

Similar Words

dp, hashing, strings, trees

Tom Riddle's Diary

brute force, implementation, strings

Diversity

greedy, implementation, strings

Palindromic characteristics

brute force, dp, hashing, strings

Petya and Exam

implementation, strings

Keyboard Layouts

implementation, strings

Rusty String

fft, math, strings

DNA Evolution

data structures, strings

String Reconstruction

data structures, greedy, sortings, strings

String Compression

dp, hashing, string suffix structures, strings

Crossword solving

brute force, implementation, strings

An impassioned circulation of affection

brute force, dp, strings, two pointers

Anthem of Berland

dp, strings

Fake News (medium)

constructive algorithms, strings

Fake News (easy)

implementation, strings

Valued Keys

constructive algorithms, greedy, strings

Mike and strings

brute force, dp, strings

Mike and palindrome

brute force, constructive algorithms, strings

Minimal string

data structures, greedy, strings

Rap God

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

Anton and Polyhedrons

implementation, strings

Innokenty and a Football League

2-sat, graphs, greedy, implementation, shortest paths, strings

Peterson Polyglot

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

String Game

binary search, greedy, strings

Cloud of Hashtags

binary search, greedy, implementation, strings

A Serial Killer

brute force, implementation, strings

Stepan and Vowels

*special problem, implementation, strings

Mahmoud and a Message

brute force, dp, greedy, strings

Mahmoud and Longest Uncommon Subsequence

constructive algorithms, strings