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

Rock-Paper-Scissors Bot

*special problem, greedy, strings

Message Transmission Error (hard version)

hashing, string suffix structures, strings, two pointers

Message Transmission Error (easy version)

brute force, strings

Alternating String

brute force, data structures, dp, greedy, implementation, strings

Square or Not

brute force, math, strings

Lazy Narek

dp, implementation, strings

Turtle and Good Pairs

constructive algorithms, greedy, sortings, strings

Turtle and Good Strings

greedy, strings

Numeric String Template

data structures, strings

Primary Task

implementation, math, strings

Slavic's Exam

greedy, implementation, strings

Strong Password

brute force, implementation, strings

Sort

dp, greedy, sortings, strings

Cases

bitmasks, brute force, dp, strings

Fortnite

combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings

Novice's Mistake

brute force, constructive algorithms, implementation, math, strings

Substring and Subsequence

brute force, greedy, strings

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

implementation, strings

Is it stated?

*special problem, strings

Are You a Robot, Again?

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