Long Inversions

brute force, greedy, implementation, sortings

0, 1, 2, Tree!

bitmasks, brute force, greedy, implementation, trees

Tandem Repeats?

brute force, strings, two pointers

Binary Search

binary search, constructive algorithms, greedy

Bessie's Birthday Cake (Hard Version)

geometry, greedy, math

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math

Find a Mine

binary search, constructive algorithms, geometry, greedy, interactive, math

Chat Screenshots

combinatorics, dfs and similar, graphs

Lexicographically Largest

binary search, constructive algorithms, data structures, greedy, sortings

Mathematical Problem

brute force, constructive algorithms, geometry, math

Triangle Construction

greedy, math

Maximum And Queries (easy version)

binary search, bitmasks, brute force, greedy

Yet Another Monster Fight

binary search, dp, greedy, implementation, math

Colorful Grid

constructive algorithms

Ones and Twos

binary search, data structures, divide and conquer, math, two pointers

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Medium Design

brute force, data structures, dp, greedy, sortings

Look Back

bitmasks, greedy

Minimum Maximum Distance

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

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

Mad City

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

Candy Party (Easy Version)

bitmasks, constructive algorithms, graphs, greedy, implementation, math

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

The Third Letter

dfs and similar, dsu, graphs, greedy, implementation

Array Painting

constructive algorithms, greedy, two pointers

k-th equality

brute force, implementation, math

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Don't Blame Me

bitmasks, combinatorics, dp, math

Running Miles

brute force, dp, greedy

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Gardening Friends

brute force, dfs and similar, dp, graphs, trees

Long Legs

brute force, math

Climbing the Tree

binary search, math

Bouncy Ball

brute force, dfs and similar, implementation

Double Lexicographically Minimum

greedy, strings

Candy Store

greedy, math, number theory

Fixed Prefix Permutations

binary search, bitmasks, data structures, hashing, math, sortings

Yet Another Tournament

binary search, greedy, sortings

Boris and His Amazing Haircut

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

Quiz Master

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

Train Splitting

constructive algorithms, graphs, greedy

Permutation Game

games

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Watch the Videos

binary search, constructive algorithms, two pointers

SlavicG's Favorite Problem

bitmasks, dfs and similar, graphs

Problem with Random Tests

brute force, dp, greedy, probabilities

Meta-set

brute force, combinatorics, data structures, hashing, math

Valiant's New Map

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

Even Subarrays

bitmasks, brute force, hashing, math, number theory

L-shapes

dfs and similar, implementation

Monoblock

combinatorics, data structures, implementation, math

Path Prefixes

binary search, data structures, dfs and similar, trees

Rorororobot

binary search, data structures, greedy, math

Chopping Carrots (Easy Version)

binary search, brute force, constructive algorithms, greedy, number theory

Equate Multisets

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

Helping the Nature

constructive algorithms, data structures, greedy

The Third Problem

combinatorics, constructive algorithms, math

Zero Path

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

Fake Plastic Trees

dfs and similar, dp, greedy, trees

Gambling

data structures, dp, greedy, math

Shifting String

graphs, math, number theory, strings

Manipulating History

constructive algorithms, greedy, strings

Railway System

constructive algorithms, graphs, greedy, interactive, sortings

Traps

constructive algorithms, greedy, sortings

Required Length

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

Tokitsukaze and Meeting

data structures, implementation, math

Cyclic Rotation

constructive algorithms, greedy, implementation, two pointers

Very Suspicious

binary search, brute force, geometry, greedy, implementation, math

Water the Trees

binary search, greedy, math

Promising String (easy version)

brute force, implementation, math, strings

Shinju and the Lost Permutation

constructive algorithms, math

Cross Coloring

data structures, implementation, math

Peculiar Movie Preferences

greedy, strings

Monsters And Spells

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

Road Optimization

dp

Hidden Permutations

dfs and similar, interactive, math

MEX and Increments

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

Singers' Tour

constructive algorithms, math

Escape The Maze (easy version)

dfs and similar, greedy, shortest paths, trees, two pointers

Game Master

data structures, dfs and similar, dp, graphs, greedy, two pointers

Training Session

combinatorics, data structures, geometry, implementation, math

The Number of Imposters

constructive algorithms, dfs and similar, dp, dsu, graphs

Bakry and Partitioning

bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees

Omkar and Determination

data structures, dp

Portal

brute force, data structures, dp, greedy, implementation

Array Stabilization (AND version)

brute force, graphs, math, number theory, shortest paths

Array Optimization by Deque

data structures, greedy

Higher Order Functions

implementation, strings

Fix the String

*special problem, bitmasks, dp, greedy

Two Hundred Twenty One (easy version)

data structures, dp, math

Up the Strip (simplified version)

brute force, data structures, dp, math, number theory

Moamen and XOR

bitmasks, combinatorics, dp, math, matrices

Cobb

bitmasks, brute force, greedy, math

Domino (easy version)

constructive algorithms, math

Manhattan Subarrays

brute force, geometry, greedy, implementation

RPD and Rap Sheet (Easy Version)

bitmasks, constructive algorithms, interactive, math

Another Problem About Dividing Numbers

constructive algorithms, math, number theory

Deleting Divisors

games, math, number theory

Kavi on Pairing Duty

combinatorics, dp, math