Good Substrings

combinatorics, data structures, data structures, dp, greedy, greedy, strings

Replace and Compress

implementation, strings

XOR Transformations (Hard Version)

bitmasks, brute force, data structures, dfs and similar, greedy, math, sortings, strings, trees

Turn Into a Palindrome

greedy, strings

AND, OR, Sort!

greedy, strings

Dr. Agos's Dark Mode

brute force, chinese remainder theorem, constructive algorithms, math, strings

Creating Abbreviations

brute force, strings

Evanescent

implementation, strings, two pointers

Always Changing

dp, greedy, math, strings

String (Hard Version)

divide and conquer, implementation, strings

String (Easy Version)

divide and conquer, implementation, strings

Masha and the Garland

data structures, dp, greedy, implementation, math, number theory, strings

Iskander and Drawings

dp, games, greedy, strings

Two Digit Strings

dp, strings

Bigrams

sortings, strings

Tatar TV Show

greedy, math, strings

Wowee Binary String

combinatorics, dp, strings

Stop Spot

implementation, strings, trees

String Cutting

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

Neural Feud

*special problem, strings

Are You Smiling?

*special problem, *special problem, *special problem, strings

A Simple RBS Problem

constructive algorithms, math, strings, trees

A Trivial String Problem

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

1-1

greedy, strings

Simons and Dividing the Rhythm

combinatorics, data structures, dp, dsu, math, string suffix structures, strings, strings, strings

ABBA Counting

fft, fft, math, number theory, strings

Six Seven

divide and conquer, math, number theory, strings, strings, trees

Specialty String

brute force, greedy, strings

Double Bracket Sequence

data structures, dp, expression parsing, flows, greedy, strings

Swap to Rearrange

constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, greedy, strings

Flipping Binary String

constructive algorithms, strings

String Rotation Game

brute force, strings

Sub-RBS (Hard Version)

dp, games, implementation, strings

Sub-RBS (Easy Version)

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

Majority Wins?

constructive algorithms, greedy, math, strings

New Year String

constructive algorithms, greedy, implementation, strings

Medical Parity

dp, strings

Alphabet City

binary search, math, strings

Ashmal

greedy, strings

Blackslex and Password

math, strings

Impost or Sus

dp, greedy, implementation, strings

Yes or Yes

greedy, strings

Optimal Shifts

bitmasks, greedy, strings

Needle in a Haystack

greedy, strings, two pointers

Kindergarten Homework

implementation, strings

Shuffling Cards with Problem Solver 68!

hashing, string suffix structures, strings

Your Name

sortings, strings

Same Difference

brute force, greedy, strings

PalindromePalindrome

data structures, strings

Copy String

greedy, implementation, strings, two pointers

Palindrome Flipping

brute force, constructive algorithms, graphs, implementation, shortest paths, strings

Incremental Subarray

math, strings

A and B

strings

Monocarp's String

binary search, greedy, strings

Bracket Groups

brute force, constructive algorithms, dp, string suffix structures, strings

Make Good

constructive algorithms, greedy, math, strings

Famous Choreographer

hashing, implementation, strings

Homework

brute force, implementation, strings

Difficult Contest

constructive algorithms, implementation, sortings, strings

Sponsor of Your Problems

dp, greedy, implementation, strings

Above the Clouds

constructive algorithms, greedy, strings

Changing the String

binary search, data structures, greedy, implementation, sortings, strings

Down with Brackets

strings

Binary String Wowee

combinatorics, dp, strings

Unpleasant Strings

binary search, dp, greedy, strings

Tung Tung Sahur

greedy, strings, two pointers

Trippi Troppi

strings

Shorten the Array

binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers

Andryusha and CCB

brute force, constructive algorithms, greedy, math, number theory, strings

Mishkin Energizer

brute force, constructive algorithms, greedy, implementation, strings

Olympiad Date

greedy, strings

Even String

brute force, combinatorics, dp, math, strings

Having Been a Treasurer in the Past, I Help Goblins Deceive

combinatorics, constructive algorithms, strings

A, B, AB and BA

constructive algorithms, greedy, sortings, strings

Palindrome Shuffle

binary search, greedy, hashing, strings, two pointers

Mascot Naming

brute force, greedy, implementation, strings

Skibidus and Rizz

constructive algorithms, greedy, strings

Skibidus and Ohio

strings

Skibidus and Amog'u

brute force, constructive algorithms, greedy, implementation, strings

Brogramming Contest

greedy, strings

String

constructive algorithms, greedy, math, strings

Stop Gaming (Hard Version)

brute force, constructive algorithms, data structures, hashing, strings

Stop Gaming (Easy Version)

brute force, constructive algorithms, greedy, hashing, strings

Cosmic Divide

brute force, geometry, hashing, math, strings

Naive String Splits

binary search, brute force, greedy, hashing, math, number theory, strings

Expression Correction

brute force, expression parsing, strings

Three Strings

dp, implementation, strings

Digital string maximization

brute force, greedy, math, strings

Kevin and Binary Strings

bitmasks, brute force, greedy, implementation, strings

Replace Character

brute force, combinatorics, greedy, strings

Missing Separators

dp, sortings, string suffix structures, strings

Saraga

greedy, strings

Normal Problem

implementation, strings

Auto Complete

binary search, data structures, hashing, implementation, sortings, strings, trees

Shohag Loves Strings

constructive algorithms, greedy, implementation, strings

Polyathlon

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

Replacement

constructive algorithms, games, strings

Two Screens

binary search, greedy, strings, two pointers

C+K+S

constructive algorithms, dfs and similar, graphs, greedy, hashing, implementation, strings

Password Cracking

constructive algorithms, interactive, strings