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

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

XOR Break --- Game Version

bitmasks, games, greedy, interactive

XOR Break --- Solo Version

bitmasks, constructive algorithms, greedy

Find a Mine

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

Yet Another Coin Problem

brute force, dp, greedy, math

Too Min Too Max

greedy, math

Turtle Tenacity: Continual Mods

constructive algorithms, greedy, math, number theory, sortings

Turtle Puzzle: Rearrange and Negate

greedy, math, sortings

Card Game

greedy, implementation

Thorns and Coins

dp, greedy, implementation

Anna and the Valentine's Day Gift

games, greedy, math, sortings

Make Equal Again

brute force, greedy, math

Make Equal

greedy

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

Lexicographically Largest

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

Maximise The Score

greedy, sortings

Sasha and the Happy Tree Cutting

bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees

Sasha and the Casino

binary search, brute force, constructive algorithms, games, greedy, math

Sasha and the Drawing

constructive algorithms, greedy, math

Sasha and the Beautiful Array

constructive algorithms, greedy, math, sortings

Modular Sequence

brute force, constructive algorithms, dp, graphs, greedy, math, number theory

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Equalize

binary search, greedy, sortings, two pointers

Paint Charges

data structures, dp, greedy, math

Microcycle

data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees

Find the Different Ones!

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

Choose the Different Ones!

brute force, greedy, math

Following the String

constructive algorithms, greedy, strings

Make it White

greedy, strings

Vlad and Trouble at MIT

dfs and similar, dp, flows, graphs, greedy, implementation, trees

Vlad and Division

bitmasks, greedy