Song of the Sirens

combinatorics, divide and conquer, hashing, math, string suffix structures, strings

Peterson Polyglot

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

Restore a Number

brute force, constructive algorithms, strings

Majority

combinatorics, dp, math, strings

Vasya and Templates

greedy, implementation, strings

Encoding

hashing, string suffix structures, strings

Enormous XOR

bitmasks, constructive algorithms, greedy, math, strings, two pointers

Log Stream Analysis

binary search, brute force, implementation, strings

Vasya and Big Integers

binary search, data structures, dp, hashing, strings

Matching Names

dfs and similar, strings, trees

Palindrome Partition

dp, string suffix structures, strings

Death Stars (medium)

hashing, strings

Sonya and Matrix Beauty

strings

Huge Strings

bitmasks, brute force, dp, implementation, strings

Morse Code

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

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Hostname Aliases

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

Good Substrings

hashing, strings

Death DBMS

data structures, string suffix structures, strings, trees

Indie Album

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

Hossam and Range Minimum Query

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

Paper task

data structures, string suffix structures, strings

Duff is Mad

data structures, strings

Side Transmutations

combinatorics, strings

Three strings

data structures, dsu, string suffix structures, strings

Maximum Questions

data structures, dp, strings

Bracket Substring

dp, strings

Minimal String Xoration

bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings

Ann and Half-Palindrome

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

Text Editor

brute force, dp, greedy, strings

Koala and Notebook

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

Middle Duplication

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

Acyclic Organic Compounds

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

String Mark

combinatorics, math, strings

Awesome Substrings

math, strings

Typical Party in Dorm

bitmasks, combinatorics, dp, strings

Abbreviation

dp, hashing, strings

Games on a CD

data structures, hashing, string suffix structures, strings

Cool Slogans

string suffix structures, strings

Vasya and Types

implementation, strings

String Multiplication

dp, greedy, strings

Palindrome Partition

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

Lock Puzzle

constructive algorithms, implementation, strings

Picking Strings

constructive algorithms, implementation, strings

Last Chance

data structures, implementation, strings

Reachable Strings

data structures, hashing, strings

Wizards and Minimal Spell

implementation, strings

Mysterious Code

dp, strings

Legen...

data structures, dp, matrices, strings

Intellectual Inquiry

dp, greedy, strings

Swapping Characters

brute force, hashing, implementation, strings

Stepan and Vowels

*special problem, implementation, strings

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Rotating Substrings

dp, strings

Forbidden Indices

dsu, string suffix structures, strings

String Compression

dp, hashing, string suffix structures, strings

Rescue Niwen!

dp, greedy, string suffix structures, strings

Short Code

data structures, dp, greedy, strings, trees

Bracket Cost

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

Chaotic Merge

combinatorics, dp, math, strings

Vanya and Brackets

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

Substrings in a String

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

Stringforces

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

Sereja and Periods

binary search, dfs and similar, strings

Anagram

greedy, strings

Palindromes

dp, strings

Palisection

strings

Logging

implementation, strings

e-Government

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

Poman Numbers

bitmasks, greedy, math, strings

Palindromic Cut

brute force, implementation, strings

Letters Removing

data structures, strings

DNA Evolution

data structures, strings

Hockey

implementation, strings

String Set Queries

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

Evolution of Weasels

greedy, implementation, strings

Kuro and GCD and XOR and SUM

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

Isomorphic Strings

hashing, strings

Beaver

data structures, dp, greedy, hashing, strings, two pointers

Text Messaging

expression parsing, greedy, strings

Two Strings

data structures, dp, strings

Xor-Subsequence (hard version)

bitmasks, data structures, dp, strings, trees

Two Bracket Sequences

dp, strings, two pointers

Periodic integer number

implementation, strings

Dreamoon and Strings

dp, strings

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

Jabber ID

implementation, strings

Pretty Song

math, strings

You Are Given Some Strings...

brute force, string suffix structures, strings

Frequency of String

hashing, string suffix structures, strings

Prefix Function Queries

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

The Fair Nut and Strings

greedy, strings

A Bit Similar

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

Three Religions

dp, implementation, strings

Compress String

dp, strings

Sequence Formatting

implementation, strings

Field of Wonders

implementation, strings

Making Genome in Berland

*special problem, dfs and similar, strings

Mike and Friends

data structures, string suffix structures, strings, trees

Kefa and Watch

data structures, hashing, strings