Not a Substring

constructive algorithms, strings

Split it!

brute force, constructive algorithms, greedy, strings

Tom Riddle's Diary

brute force, implementation, strings

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

ABBB

brute force, data structures, greedy, strings

A-B Palindrome

constructive algorithms, implementation, strings

Jumping on Tiles

constructive algorithms, strings

LuoTianyi and the Palindrome String

greedy, strings

Erase First or Second Letter

brute force, combinatorics, data structures, dp, strings

Mirror in the String

greedy, strings

Three Strings

implementation, strings

Even But Not Even

greedy, math, strings

Palindromic Indices

greedy, strings

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

Non-Substring Subsequence

dp, greedy, implementation, strings

Broken Keyboard

brute force, strings, two pointers

Get an Even String

dp, greedy, strings

Diverse Strings

implementation, strings

Telephone Number

brute force, greedy, strings

Typical Interview Problem

brute force, implementation, strings

Common Prefixes

constructive algorithms, greedy, strings

Prefixes

strings

Equalize

dp, greedy, strings

Subtle Substring Subtraction

games, greedy, strings

Removal of Unattractive Pairs

constructive algorithms, greedy, math, strings

The String Has a Target

greedy, strings

Vasya and String

binary search, dp, strings, two pointers

Secret Sport

implementation, strings

Make Them Equal

brute force, greedy, math, strings

Substrings Sort

sortings, strings

New Year and Naming

implementation, strings

Password

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

Prinzessin der Verurteilung

brute force, constructive algorithms, strings

Make a Power of Two

greedy, math, strings

Longest Palindrome

brute force, constructive algorithms, greedy, implementation, strings

Canine poetry

dp, greedy, strings

Different is Good

constructive algorithms, implementation, strings

2-Letter Strings

data structures, math, strings

Superhero Transformation

implementation, strings

Prefix and Suffix Array

strings

Even Substrings

implementation, strings

Yura's New Name

implementation, strings

Dominant Character

brute force, greedy, implementation, strings

Comparing Strings

implementation, strings

Palindromes Coloring

binary search, greedy, sortings, strings

Letters Rearranging

constructive algorithms, greedy, sortings, strings

Forbidden Subsequence

constructive algorithms, greedy, sortings, strings

Unstable String

binary search, dp, greedy, implementation, strings, two pointers

Asterisk-Minor Template

implementation, strings

LLPS

binary search, bitmasks, brute force, greedy, implementation, strings

Serval and Inversion Magic

brute force, implementation, strings, two pointers

XOR Palindromes

bitmasks, constructive algorithms, strings

Shuffle Hashing

brute force, implementation, strings

Suffix Structures

implementation, strings

Letter

implementation, strings

Radio Station

implementation, strings

Hard problem

dp, strings

K-Complete Word

dfs and similar, dsu, greedy, implementation, strings

Misha and Changing Handles

data structures, dsu, strings

Dominated Subarray

greedy, implementation, sortings, strings, two pointers

Palindromic Twist

implementation, strings

Prefix Removals

strings

String Equality

dp, greedy, hashing, implementation, strings

Important Exam

implementation, strings

Sum of Substrings

brute force, constructive algorithms, greedy, math, strings

Milica and String

brute force, implementation, strings

Keanu Reeves

strings

Diverse Substring

implementation, strings

Balanced Bitstring

implementation, strings

Romaji

implementation, strings

Swap and Reverse

constructive algorithms, greedy, sortings, strings

Character Swap (Easy Version)

strings

Strings Equalization

strings

Equality

implementation, strings

Grandma Capa Knits a Scarf

brute force, data structures, greedy, strings, two pointers

A Perfectly Balanced String?

brute force, greedy, strings

Phoenix and Distribution

constructive algorithms, greedy, sortings, strings

Diverse Substrings

brute force, implementation, strings

Keyboard Layouts

implementation, strings

awoo's Favorite Problem

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

Vitaliy and Pie

greedy, hashing, strings

Reverse String

brute force, dp, hashing, implementation, strings

WOW Factor

dp, strings

They Are Everywhere

binary search, strings, two pointers

Tear It Apart

brute force, implementation, math, strings

Reverse a Substring

implementation, sortings, strings

Backspace

dp, greedy, strings, two pointers

JoJo's Incredible Adventures

math, strings, two pointers

Strong Password

binary search, dp, greedy, strings

AB Flipping

greedy, strings, two pointers

Are You a Robot?

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

Email from Polycarp

implementation, strings

Interesting Story

greedy, sortings, strings

Minimizing the String

greedy, strings

From S To T

implementation, strings

Prefix Flip (Hard Version)

constructive algorithms, data structures, implementation, strings, two pointers

Kyoya and Photobooks

brute force, math, strings

Longest Regular Bracket Sequence

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

Game with Reversing

games, greedy, math, strings

Obtain The String

dp, greedy, strings