Creating Words

implementation, strings

''a'' String Problem

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

Yasya and the Mysterious Tree

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

Fixing a Binary String

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

Verify Password

implementation, sortings, strings

378QAQ and Core

greedy, strings

Zimpha Fan Club

fft, greedy, math, strings

Symmetric Encoding

implementation, sortings, strings

Binary Cut

dp, greedy, implementation, sortings, strings

Different String

implementation, strings

Arithmancy (Medium)

constructive algorithms, interactive, probabilities, strings

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Division + LCP (hard version)

binary search, brute force, data structures, dp, hashing, math, string suffix structures, strings

Division + LCP (easy version)

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

Folding Strip

constructive algorithms, greedy, strings

Palindrome

*special problem, implementation, strings

Is it stated?

*special problem, strings

Are You a Robot, Again?

*special problem, strings

No Palindromes

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

Shuffling Songs

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

Nearly Shortest Repeating Substring

brute force, implementation, number theory, strings

Tandem Repeats?

brute force, strings, two pointers

Non-Palindromic Substring

hashing, implementation, math, strings

Rudolf and the Ugly String

dp, greedy, strings

Entertainment in MAC

constructive algorithms, strings

Recovering a Small String

brute force, strings

Sum over all Substrings (Hard Version)

bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

Following the String

constructive algorithms, greedy, strings

Make it White

greedy, strings

We Got Everything Covered!

constructive algorithms, greedy, strings

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

Shrink-Reverse

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

Tricky Template

constructive algorithms, implementation, strings

Erase First or Second Letter

brute force, combinatorics, data structures, dp, strings

Unnatural Language Processing

greedy, implementation, strings

Problemsolving Log

implementation, strings

Palindromic Problem

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

Swap and Delete

strings

LOL Lovers

strings

Pumping Lemma

hashing, strings

Removal of Unattractive Pairs

constructive algorithms, greedy, math, strings

YetnotherrokenKeoard

data structures, implementation, strings

Largest Subsequence

greedy, strings

Collapsing Strings

data structures, strings, trees

Cover in Water

constructive algorithms, greedy, implementation, strings

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Milica and String

brute force, implementation, strings

AB Flipping

greedy, strings, two pointers

Secret Sport

implementation, strings

Decreasing String

implementation, strings

Chemistry

strings

Don't Try to Count

brute force, strings

XOR Palindromes

bitmasks, constructive algorithms, strings

Guess Game

bitmasks, data structures, games, math, probabilities, sortings, strings, trees

Swap and Reverse

constructive algorithms, greedy, sortings, strings

Gift Carpet

dp, greedy, implementation, strings

Queries for the Array

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

Not a Substring

constructive algorithms, strings

Lisa and the Martians

bitmasks, greedy, math, strings, trees

Word on the Paper

implementation, strings

Binary String Copying

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

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Rudolph and Tic-Tac-Toe

brute force, implementation, strings

Strong Password

binary search, dp, greedy, strings

Row Major

constructive algorithms, greedy, math, number theory, strings

Ranom Numbers

brute force, dp, greedy, math, strings

Cipher Shifer

implementation, strings, two pointers

Bracket Walk

data structures, greedy, strings

Game with Reversing

games, greedy, math, strings

Musical Puzzle

implementation, strings

New Palindrome

strings

Love Story

implementation, strings

Palindrome Partition

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

LuoTianyi and the Palindrome String

greedy, strings

Unique Palindromes

constructive algorithms, math, strings

Making Anti-Palindromes

greedy, math, strings

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Tear It Apart

brute force, implementation, math, strings

JoJo's Incredible Adventures

math, strings, two pointers

Yura's New Name

implementation, strings

Entangled Substrings

string suffix structures, strings

Bosco and Particle

dp, math, number theory, strings

Unmysterious Language

*special problem, constructive algorithms, strings

Are You a Robot?

*special problem, *special problem, *special problem, expression parsing, strings

Insert Digit

greedy, math, strings

Find and Replace

greedy, implementation, strings

The String Has a Target

greedy, strings

A task for substrings

data structures, string suffix structures, strings

Dasha and Nightmares

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

Unforgivable Curse (hard version)

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

Unforgivable Curse (easy version)

brute force, constructive algorithms, dsu, graphs, greedy, strings

Remove Two Letters

data structures, greedy, hashing, strings

Count the Number of Pairs

greedy, strings

Is It a Cat?

implementation, strings

Double Lexicographically Minimum

greedy, strings

Asterisk-Minor Template

implementation, strings

Typical Interview Problem

brute force, implementation, strings

Two Towers

brute force, implementation, strings

Prefix and Suffix Array

strings