Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Bracket Walk

data structures, greedy, strings

Subsequences of Length Two

dp, strings

Calendar

greedy, strings

Diverse Substrings

dp, strings, two pointers

Log Stream Analysis

binary search, brute force, implementation, strings

Death Stars (medium)

hashing, strings

Last Chance

data structures, implementation, strings

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Sereja and Periods

binary search, dfs and similar, strings

Pretty Song

math, strings

The Fair Nut and Strings

greedy, strings

Running Track

dp, greedy, strings, trees

Work Group

dfs and similar, dp, graphs, strings, trees

New Year and Ancient Prophecy

dp, hashing, strings

Obsessive String

dp, strings

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Petr#

brute force, data structures, hashing, strings

Famil Door and Brackets

dp, strings

Kirk and a Binary String (easy version)

brute force, greedy, strings

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Equalizing Two Strings

constructive algorithms, sortings, strings

Linguistics

greedy, implementation, sortings, strings

Non-Palindromic Substring

hashing, implementation, math, strings

Lucky Common Subsequence

dp, strings

Masha-forgetful

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

Reverse

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

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

XOR Inverse

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

K-beautiful Strings

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

Number of Subsequences

combinatorics, dp, strings

Watto and Mechanism

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

Compress Words

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

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Name

greedy, strings

Autocompletion

*special problem, strings, trees

Palindromes

dp, strings

Logging

implementation, strings

Two Strings

data structures, dp, strings

Jabber ID

implementation, strings

Dense Subsequence

data structures, greedy, strings

Felicity is Coming!

data structures, hashing, sortings, strings

Fancy Number

brute force, greedy, sortings, strings

Spy Syndrome 2

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

Chladni Figure

brute force, strings

Innokenty and a Football League

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

Subsequences (hard version)

dp, strings

Generating Sets

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

Alyona and Strings

dp, strings

Division + LCP (easy version)

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

Shuffling Songs

bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Unique Palindromes

constructive algorithms, math, strings

Dasha and Nightmares

bitmasks, hashing, meet-in-the-middle, strings

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Collapsing Strings

data structures, strings, trees

Palindromic characteristics

brute force, dp, hashing, strings

Median String

bitmasks, math, number theory, strings

Archaeology

brute force, constructive algorithms, greedy, strings

Print a 1337-string...

combinatorics, constructive algorithms, math, strings

A Lot of Games

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

AB-string

binary search, combinatorics, dp, strings

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

String Reversal

data structures, greedy, strings

Dr. Evil Underscores

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

Longest Regular Bracket Sequence

constructive algorithms, data structures, dp, greedy, sortings, strings

Ali goes shopping

*special problem, brute force, strings

Vasya and Types

implementation, strings

Anagram

greedy, strings

Palindromic Cut

brute force, implementation, strings

Beaver

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

Correcting Mistakes

constructive algorithms, dp, greedy, hashing, strings, two pointers

Exponential notation

implementation, strings

Lexicography

constructive algorithms, strings

Reberland Linguistics

dp, implementation, strings

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

ZgukistringZ

brute force, constructive algorithms, implementation, strings

Circus

brute force, greedy, math, strings

Perfect Security

data structures, greedy, strings, trees

Sasha and One More Name

constructive algorithms, hashing, strings

Cloud of Hashtags

binary search, greedy, implementation, strings

Irreducible Anagrams

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

Lisa and the Martians

bitmasks, greedy, math, strings, trees

Make Palindrome

constructive algorithms, greedy, strings

Xor-Subsequence (easy version)

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

Queries for Number of Palindromes

dp, hashing, strings

Infinite Set

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

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Ranom Numbers

brute force, dp, greedy, math, strings

MUH and Cube Walls

string suffix structures, strings

Catching Cheaters

dp, strings

Polycarp and String Transformation

binary search, implementation, sortings, strings

Recover an RBS

constructive algorithms, greedy, implementation, strings

Diane

constructive algorithms, greedy, strings

Prefix-Suffix Palindrome (Hard version)

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

Good Substrings

data structures, strings

Good Substrings

hashing, strings

Wizards and Minimal Spell

implementation, strings

Periodic integer number

implementation, strings

Sequence Formatting

implementation, strings