Array Painting

constructive algorithms, greedy, two pointers

Candy Store

greedy, math, number theory

Coloring Trees

dp

Short Task

brute force, dp, math, number theory

Quiz Master

binary search, math, number theory, sortings, two pointers

Walk on Matrix

bitmasks, constructive algorithms, math

Infinite Fence

greedy, math, number theory

Mathematical Problem

brute force, constructive algorithms, geometry, math

Manipulating History

constructive algorithms, greedy, strings

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

Ladder

dp, implementation, two pointers

Fake Plastic Trees

dfs and similar, dp, greedy, trees

Bargain

combinatorics, dp, math

Rorororobot

binary search, data structures, greedy, math

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Xenia and Weights

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Minimum Array

binary search, data structures, greedy

Arithmetic Progression

implementation, sortings

Tandem Repeats?

brute force, strings, two pointers

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Long Beautiful Integer

constructive algorithms, greedy, implementation, strings

Moamen and XOR

bitmasks, combinatorics, dp, math, matrices

Monoblock

combinatorics, data structures, implementation, math

Multiplicity

data structures, dp, implementation, math, number theory

Journey

dfs and similar, dp, dsu, implementation

Training Session

combinatorics, data structures, geometry, implementation, math

Omkar and Bed Wars

dp, greedy

Kavi on Pairing Duty

combinatorics, dp, math

Beautiful Graph

dfs and similar, graphs

Running Miles

brute force, dp, greedy

Choosing Capital for Treeland

dfs and similar, dp, graphs, trees

String Deletion

binary search, data structures, greedy, two pointers

Primes and Multiplication

math, number theory

MEX and Increments

constructive algorithms, data structures, dp, greedy, implementation, math, sortings

Barcode

dp, matrices

White Sheet

geometry, math

Cow and Snacks

dfs and similar, dsu, graphs

Yet Another Tournament

binary search, greedy, sortings

Harmonious Graph

constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings

Pipeline

binary search, math

Hacking Cypher

brute force, math, number theory, strings

Count the Arrays

combinatorics, math

Water the Trees

binary search, greedy, math

Even Subarrays

bitmasks, brute force, hashing, math, number theory

Ayoub's function

binary search, combinatorics, greedy, math, strings

Infinite Prefixes

math, strings

Shinju and the Lost Permutation

constructive algorithms, math

Ceil Divisions

brute force, constructive algorithms, math, number theory

Close Tuples (hard version)

binary search, combinatorics, implementation, math, sortings, two pointers

By Elevator or Stairs?

dp, shortest paths

Circle Game

games, geometry, math

Required Length

brute force, dfs and similar, dp, hashing, shortest paths

Geometric Progression

binary search, data structures, dp

Traps

constructive algorithms, greedy, sortings

Program

data structures, dp, implementation, strings

Substring

dfs and similar, dp, graphs

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

The Third Problem

combinatorics, constructive algorithms, math

Nezzar and Symmetric Array

implementation, math, sortings

Vasya and Chess

constructive algorithms, games, math

Floor and Mod

binary search, brute force, math, number theory

Long Legs

brute force, math

Mysterious Present

dp, sortings

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Manhattan Subarrays

brute force, geometry, greedy, implementation

Road Optimization

dp

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Pinkie Pie Eats Patty-cakes

constructive algorithms, greedy, math, sortings

Equivalent Strings

divide and conquer, hashing, sortings, strings

Zero Path

brute force, data structures, dp, graphs, greedy, shortest paths

Three Blocks Palindrome (easy version)

binary search, brute force, data structures, dp, two pointers

Cover it!

dfs and similar, dsu, graphs, shortest paths, trees

Helping the Nature

constructive algorithms, data structures, greedy

Igor In the Museum

dfs and similar, graphs, shortest paths

Monsters And Spells

binary search, data structures, dp, greedy, implementation, math, two pointers

Bits

bitmasks, constructive algorithms

Hills And Valleys

brute force, implementation

Graph Without Long Directed Paths

dfs and similar, graphs

RPG Protagonist

brute force, greedy, math

Xenia and Colorful Gems

binary search, greedy, math, sortings, two pointers

String Game

binary search, greedy, strings

Searching Local Minimum

binary search, interactive, ternary search

Peculiar Movie Preferences

greedy, strings

AND, OR and square sum

bitmasks, greedy, math

Soldier and Number Game

constructive algorithms, dp, math, number theory

Palindrome Transformation

brute force, greedy, implementation

Baby Ehab Partitions Again

bitmasks, constructive algorithms, dp, math

Ehab the Xorcist

bitmasks, constructive algorithms, greedy, number theory

Spy-string

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

Deleting Divisors

games, math, number theory

Eugene and an array

binary search, data structures, implementation, two pointers

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Cobb

bitmasks, brute force, greedy, math

Sleeping Schedule

dp, implementation

Prefix Flip (Hard Version)

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

Checkposts

dfs and similar, graphs, two pointers

Little Girl and Maximum XOR

bitmasks, dp, greedy, implementation, math