Tandem Repeats?

brute force, strings, two pointers

Eevee

brute force, implementation, strings

Manipulating History

constructive algorithms, greedy, strings

Balanced Ternary String

greedy, strings

Common Divisors

brute force, hashing, implementation, math, strings

Tanya and Postcard

greedy, implementation, strings

Set of Strings

implementation, strings

Polycarp and String Transformation

binary search, implementation, sortings, strings

Flexible String

bitmasks, brute force, strings

Catching Cheaters

dp, strings

MUH and Cube Walls

string suffix structures, strings

Strings of Power

implementation, strings, two pointers

Dr. Evil Underscores

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

Serval and Parenthesis Sequence

greedy, strings

Ranom Numbers

brute force, dp, greedy, math, strings

Interview with Oleg

implementation, strings

The Smallest String Concatenation

sortings, strings

String Typing

implementation, strings

Love Rescue

dfs and similar, dsu, graphs, greedy, strings

Code obfuscation

greedy, implementation, strings

Equal Frequencies

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

The Text Splitting

brute force, implementation, strings

A Tide of Riverscape

constructive algorithms, strings

Promising String (easy version)

brute force, implementation, math, strings

Character Swap (Hard Version)

strings

Compress Words

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

Shifting String

graphs, math, number theory, strings

Fake News (easy)

implementation, strings

Mr. Kitayuta's Gift

brute force, implementation, strings

Help Far Away Kingdom

strings

Hamming Distance Sum

combinatorics, strings

Watto and Mechanism

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

Verse Pattern

implementation, strings

An impassioned circulation of affection

brute force, dp, strings, two pointers

Vanya and Label

bitmasks, combinatorics, implementation, strings

Minimal string

data structures, greedy, strings

LOL Lovers

strings

Phone Numbers

implementation, strings

Petya and Java

implementation, strings

Split a Number

greedy, implementation, strings

String Reversal

data structures, greedy, strings

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Marina and Vasya

constructive algorithms, greedy, strings

Infinite Set

bitmasks, dp, math, matrices, number theory, strings

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Queries for Number of Palindromes

dp, hashing, strings

No to Palindromes!

greedy, strings

Unmysterious Language

*special problem, constructive algorithms, strings

Camp Schedule

greedy, hashing, strings

Prefixes and Suffixes

strings

AB-string

binary search, combinatorics, dp, strings

Xor-Subsequence (easy version)

bitmasks, brute force, dp, strings, trees, two pointers

Barnicle

brute force, implementation, math, strings

Bear and String Distance

greedy, strings

A Lot of Games

dfs and similar, dp, games, implementation, strings, trees

Make Palindrome

constructive algorithms, greedy, strings

Phone Numbers

constructive algorithms, implementation, strings

A Simple Task

data structures, sortings, strings

Center Alignment

implementation, strings

Choosing Symbol Pairs

strings

Train and Peter

strings

Double Lexicographically Minimum

greedy, strings

Lexicographically Maximum Subsequence

greedy, strings

Santa Claus and Keyboard Check

implementation, strings

Lisa and the Martians

bitmasks, greedy, math, strings, trees

African Crossword

implementation, strings

Phone Numbers

implementation, strings

Internet Address

implementation, strings

Number of Subsequences

combinatorics, dp, strings

Erase and Extend (Hard Version)

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

Help Kingdom of Far Far Away 2

implementation, strings

Cloud of Hashtags

binary search, greedy, implementation, strings

Irreducible Anagrams

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

Bear and Compressing

brute force, dfs and similar, dp, strings

Print a 1337-string...

combinatorics, constructive algorithms, math, strings

Whose sentence is it?

implementation, strings

Extract Numbers

implementation, strings

s-palindrome

implementation, strings

K-beautiful Strings

binary search, brute force, constructive algorithms, greedy, strings

Beautiful Lyrics

data structures, greedy, strings

Petya and Exam

implementation, strings

Mahmoud and a Message

brute force, dp, greedy, strings

Subsequences of Length Two

dp, strings

Sasha and One More Name

constructive algorithms, hashing, strings

Palindrome pairs

*special problem, brute force, dp, strings

Another Sorting Problem

data structures, sortings, strings

XOR Inverse

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

Perfect Security

data structures, greedy, strings, trees

Archaeology

brute force, constructive algorithms, greedy, strings

Sysadmin Bob

greedy, implementation, strings

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Shockers

implementation, strings

DNA Alignment

math, strings

Page Numbers

expression parsing, implementation, sortings, strings

Palindrome Pairs

hashing, strings

Reverse

bitmasks, constructive algorithms, dfs and similar, implementation, math, strings

Kolya and Tandem Repeat

brute force, implementation, strings

Median String

bitmasks, math, number theory, strings

String Reconstruction

data structures, greedy, sortings, strings

Masha-forgetful

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