Cyclic Shifts

*special problem, strings

Suffix Subgroup

*special problem, strings

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Mio and Lucky Array

constructive algorithms, fft, math, strings

Palindromic Magic

data structures, hashing, strings

String Theory

geometry, math, strings

Two Sequences

data structures, hashing, string suffix structures

Permutation Concatenation

string suffix structures

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Upside Down

data structures, string suffix structures, strings, trees

Arithmancy (Medium)

constructive algorithms, interactive, probabilities, strings

Viruses

*special problem, dp, shortest paths, string suffix structures

Boboniu and Banknote Collection

strings

Hongcow Masters the Cyclic Shift

strings, two pointers

Rap God

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

Detect Robots

data structures, strings

Alphabetic Tree

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

Cutting the Line

string suffix structures, strings

Moonwalk challenge

data structures, strings, trees

Fibonacci Strings

strings

Fibonacci Strings

matrices, strings

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Entangled Substrings

string suffix structures, strings

Mahmoud and Ehab and the final stage

data structures, strings

Speckled Band

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

Ж-function

string suffix structures, strings

Palindrome Addicts

data structures, strings

Fibonacci Suffix

strings

Expected Value Again

combinatorics, strings

Modest Substrings

dp, strings

Palindromic Problem

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

Wrap Around

dp, strings

Representative Sampling

dp, sortings, strings

AB-Strings

constructive algorithms, strings

Pumping Lemma

hashing, strings

The Sum of Good Numbers

hashing, math, string suffix structures, strings

Find String in a Grid

data structures, dp, strings, trees

Bosco and Particle

dp, math, number theory, strings

Shrink-Reverse

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

Asterisk Substrings

string suffix structures

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

A task for substrings

data structures, string suffix structures, strings

Appleman and a Game

binary search, shortest paths, strings

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

Wilbur and Strings

dfs and similar, dp, graphs, strings

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings

Letters and Question Marks

bitmasks, dp, string suffix structures

Speed Dial

dp, strings, trees

Two Prefixes

strings

Chainword

brute force, data structures, dp, matrices, string suffix structures, strings

Fake News (medium)

constructive algorithms, strings

Reverses

dp, string suffix structures, strings

Exam

data structures, string suffix structures, trees

String Distance

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

Fence

binary search, data structures, string suffix structures

Tree and XOR

strings, trees

Puzzle Lover

dp, hashing, strings

Scissors

brute force, strings

Au Pont Rouge

binary search, dp, strings

Good Substrings

string suffix structures

String Transformation

hashing, strings

Similar Words

dp, hashing, strings, trees

Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

Good Substrings

string suffix structures

Fedya the Potter Strikes Back

data structures, strings

Dreamoon and Binary

dp, strings

Matrix Rank (Hard Version)

combinatorics, dp, math, matrices, string suffix structures

Keyboard Design

bitmasks, data structures, dp, string suffix structures, strings

Concatenation with intersection

data structures, hashing, strings, two pointers

Serval and Brain Power

bitmasks, brute force, dp, greedy, implementation, strings

And Yet Another Bracket Sequence

data structures, greedy, hashing, string suffix structures, strings

The Next Good String

data structures, greedy, hashing, strings

Construct the String

data structures, dp, strings

Expensive Strings

string suffix structures, strings

Holiday Wall Ornaments

dp, strings

Mission Impassable

dp, strings

Have You Ever Heard About the Word?

greedy, hashing, string suffix structures, strings

Refactoring

greedy, implementation, strings

Digits of Number Pi

dp, implementation, strings

k-substrings

binary search, hashing, string suffix structures

Delicious Dessert

binary search, dsu, hashing, math, number theory, string suffix structures

Tricky and Clever Password

binary search, constructive algorithms, data structures, greedy, hashing, strings

Middle-Out

constructive algorithms, greedy, strings

Genetic engineering

dp, string suffix structures, trees

Mr. Kitayuta's Gift

combinatorics, dp, matrices, strings

Xors on Segments

data structures, strings, trees

Minlexes

dp, greedy, implementation, strings

Birthday

graph matchings, strings

DZY Loves Strings

binary search, hashing, strings, two pointers

Liar

binary search, dp, hashing, string suffix structures

Codeword

combinatorics, strings

Two Permutations

data structures, hashing, strings

Marbles

hashing, strings

x-prime Substrings

brute force, dfs and similar, dp, string suffix structures, strings

Rusty String

fft, math, strings

String Journey

data structures, dp, string suffix structures

The Supersonic Rocket

geometry, hashing, strings

Alphabet Permutations

data structures, strings

Comfortably Numb

bitmasks, data structures, divide and conquer, strings, trees

Strange LCS

bitmasks, dp, graphs, greedy, strings