Good Prefixes

greedy

Shuffle

dp, greedy, trees

Magnitude (Hard Version)

combinatorics, dp, greedy, math

Magnitude (Easy Version)

dp, greedy, math

Turtle and Intersected Segments

data structures, dsu, graphs, greedy

Turtle and an Incomplete Sequence

bitmasks, brute force, constructive algorithms, greedy, implementation, math

Turtle and Piggy Are Playing a Game

brute force, greedy, math

Yasya and the Mysterious Tree

bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees

Permutation of Rows and Columns

constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings

GCD-sequence

greedy, implementation, math, number theory

Sofia and the Lost Operations

constructive algorithms, greedy

Fixing a Binary String

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

XOR Sequences

bitmasks, greedy

Guess the Maximum

brute force, greedy, implementation

Computing Machine

data structures, dp, greedy, implementation

Elections

data structures, greedy, implementation, math

Manhattan Permutations

constructive algorithms, greedy, implementation, math

New Bakery

binary search, greedy, math, ternary search

XORificator

bitmasks, brute force, greedy, hashing

Nikita and LCM

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

Binary Colouring

bitmasks, constructive algorithms, greedy, math

Remove Bridges

data structures, dfs and similar, dp, greedy, sortings, trees

Splittable Permutations

combinatorics, data structures, dfs and similar, greedy, math, trees

Job Interview

binary search, dp, greedy, implementation, two pointers

Increase/Decrease/Copy

greedy, implementation

378QAQ and Core

greedy, strings

Zimpha Fan Club

fft, greedy, math, strings

Paint the Tree

brute force, dfs and similar, dp, greedy, shortest paths, trees

Chamo and Mocha's Array

binary search, brute force, greedy

378QAQ and Mocha's Array

brute force, greedy, math, sortings

Bazoka and Mocha's Array

brute force, greedy, implementation, sortings

Money Buys Less Happiness Now

data structures, greedy, sortings

Ingenuity-2

constructive algorithms, greedy, implementation

Phone Desktop

greedy, math

Cat, Fox and Double Maximum

constructive algorithms, greedy, implementation, math, sortings

Cat, Fox and the Lonely Array

binary search, bitmasks, data structures, greedy, math, two pointers

Contest Proposal

brute force, greedy, two pointers

Binary Cut

dp, greedy, implementation, sortings, strings

Card Pairing

dp, greedy, hashing, implementation

Unique Array

binary search, data structures, divide and conquer, dp, greedy

Shop Game

data structures, greedy, math, sortings

Shifts and Sorting

constructive algorithms, greedy

Permutation Game

brute force, dfs and similar, games, graphs, greedy, math

Prefiquence

greedy, two pointers

Permutation Counting

binary search, greedy, implementation, math, sortings

Card Exchange

constructive algorithms, games, greedy

Folding Strip

constructive algorithms, greedy, strings

Missing Subsequence Sum

bitmasks, constructive algorithms, greedy, number theory

Everything Nim

games, greedy, math, sortings

A BIT of a Construction

bitmasks, constructive algorithms, greedy, implementation

Stickogon

constructive algorithms, greedy

Nene vs. Monsters (Hard Version)

brute force, greedy, implementation, math

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

Nene's Magical Matrix

constructive algorithms, greedy, math

Nene and the Card Game

games, greedy

Nene's Game

binary search, brute force, data structures, games, greedy

Unfair Game

dp, games, greedy, math, schedules

Long Inversions

brute force, greedy, implementation, sortings

Inhabitant of the Deep Sea

greedy, implementation, math

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Long Multiplication

greedy, math, number theory

Painting the Ribbon

constructive algorithms, greedy, math

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Thanos Snap

binary search, dp, games, greedy, trees

Inversion Composition

constructive algorithms, data structures, greedy

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Buying Jewels

constructive algorithms, greedy, math

Ticket Hoarding

greedy, math, sortings

Battle Cows

binary search, data structures, greedy

Dual Trigger

constructive algorithms, greedy, math

0, 1, 2, Tree!

bitmasks, brute force, greedy, implementation, trees

Division Avoidance

greedy, math

Scooter

graphs, greedy

Dating

greedy, sortings, trees

Annual Ants' Gathering

dfs and similar, dp, greedy, trees

Charming Meals

binary search, brute force, greedy, sortings

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

Array Fix

brute force, dp, greedy, implementation

Birthday Gift

bitmasks, brute force, constructive algorithms, greedy, implementation

Tree Cutting

binary search, dp, greedy, implementation, trees

Maximum Sum

dp, greedy, math

Median of an Array

greedy, implementation, sortings

Binary Search

binary search, constructive algorithms, greedy

Seraphim the Owl

dp, greedy

Setting up Camp

greedy, math

Destroying Bridges

graphs, greedy, math

MEX Game 2 (Hard Version)

binary search, greedy, two pointers

MEX Game 2 (Easy Version)

binary search, brute force, greedy

Tree Compass

constructive algorithms, dfs and similar, greedy, trees

MEX Game 1

games, greedy

Learning to Paint

binary search, data structures, dfs and similar, dp, greedy, implementation, sortings

Bessie's Birthday Cake (Hard Version)

geometry, greedy, math

Bessie's Birthday Cake (Easy Version)

geometry, greedy, math

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Rudolf and the Ugly String

dp, greedy, strings

Rudolf and 121

brute force, dp, greedy, math

Binary Path

dp, greedy, implementation

Bitwise Paradox

binary search, bitmasks, data structures, greedy, two pointers

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math