Comments

dfs and similar, expression parsing, implementation, strings

Higher Order Functions

implementation, strings

Correct Bracket Sequence Editor

data structures, dsu, strings

String Reconstruction

data structures, greedy, sortings, strings

Mahmoud and a Message

brute force, dp, greedy, strings

Beautiful Lyrics

data structures, greedy, strings

Double Lexicographically Minimum

greedy, strings

Prefixes and Suffixes

strings

No to Palindromes!

greedy, strings

Marina and Vasya

constructive algorithms, greedy, strings

Minimal string

data structures, greedy, strings

Shifting String

graphs, math, number theory, strings

Promising String (easy version)

brute force, implementation, math, strings

The Smallest String Concatenation

sortings, strings

Serval and Parenthesis Sequence

greedy, strings

Manipulating History

constructive algorithms, greedy, strings

Tandem Repeats?

brute force, strings, two pointers

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Hacking Cypher

brute force, math, number theory, strings

Ayoub's function

binary search, combinatorics, greedy, math, strings

Infinite Prefixes

math, strings

Program

data structures, dp, implementation, strings

String Transformation 1

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

Equivalent Strings

divide and conquer, hashing, sortings, strings

String Game

binary search, greedy, strings

Peculiar Movie Preferences

greedy, strings

Spy-string

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

Prefix Flip (Hard Version)

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

Password

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

Stepan and Vowels

*special problem, implementation, strings

Hockey

implementation, strings

Text Messaging

expression parsing, greedy, strings

Bill Total Value

expression parsing, implementation, strings

Grammar Lessons

implementation, strings

Game with String

implementation, probabilities, strings

Hidden Word

brute force, constructive algorithms, implementation, strings

Ancient Prophesy

brute force, implementation, strings

Shockers

implementation, strings

Palindrome Pairs

hashing, strings

Petya and Exam

implementation, strings

s-palindrome

implementation, strings

Extract Numbers

implementation, strings

Camp Schedule

greedy, hashing, strings

An impassioned circulation of affection

brute force, dp, strings, two pointers

Character Swap (Hard Version)

strings

Equal Frequencies

brute force, constructive algorithms, greedy, implementation, sortings, strings

Love Rescue

dfs and similar, dsu, graphs, greedy, strings

Flexible String

bitmasks, brute force, strings

Color with Occurrences

brute force, data structures, dp, greedy, strings

Vitaly and Strings

constructive algorithms, strings

Queries for the Array

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

Remove Adjacent

brute force, constructive algorithms, greedy, strings

Binary String

binary search, greedy, strings, two pointers

Making Anti-Palindromes

greedy, math, strings

Binary String Copying

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

Decreasing String

implementation, strings

Min Cost String

brute force, constructive algorithms, graphs, greedy, strings

Say No to Palindromes

brute force, constructive algorithms, dp, strings

Another Problem on Strings

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

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

Obtain The String

dp, greedy, strings

Phoenix and Distribution

constructive algorithms, greedy, sortings, strings

Hard problem

dp, strings

World of Mouth

*special problem, strings

Field of Wonders

implementation, strings

Making Genome in Berland

*special problem, dfs and similar, strings

Restoring IPv6

implementation, strings

Lucky Transformation

strings

Spelling Check

hashing, implementation, strings

Facetook Priority Wall

expression parsing, implementation, strings

New Problem

brute force, strings

Newspaper Headline

greedy, strings

Dima and Text Messages

brute force, strings

Anagram Search

implementation, strings

Kolya and Tandem Repeat

brute force, implementation, strings

DNA Alignment

math, strings

Sysadmin Bob

greedy, implementation, strings

Palindrome pairs

*special problem, brute force, dp, strings

Santa Claus and Keyboard Check

implementation, strings

Choosing Symbol Pairs

strings

Phone Numbers

constructive algorithms, implementation, strings

Split a Number

greedy, implementation, strings

Vanya and Label

bitmasks, combinatorics, implementation, strings

Hamming Distance Sum

combinatorics, strings

Balanced Ternary String

greedy, strings

Replace With the Previous, Minimize

dsu, greedy, strings

Smaller

constructive algorithms, greedy, strings

Cow and Message

brute force, dp, math, strings

Acacius and String

brute force, implementation, strings

Prefix-Suffix Palindrome (Easy version)

hashing, string suffix structures, strings

Unforgivable Curse (hard version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings

Nearly Shortest Repeating Substring

brute force, implementation, number theory, strings

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

Interesting Story

greedy, sortings, strings

Backspace

dp, greedy, strings, two pointers

They Are Everywhere

binary search, strings, two pointers

Balanced Bitstring

implementation, strings

K-Complete Word

dfs and similar, dsu, greedy, implementation, strings

Vasya and String

binary search, dp, strings, two pointers

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings