Copium Permutation

constructive algorithms, data structures, greedy

Slime and Hats

constructive algorithms, dp, greedy

Kuroni the Private Tutor

binary search, greedy

Balanced Distribution

data structures, dp, greedy

Permutation Weight (Hard Version)

constructive algorithms, greedy

Maximum Product?

brute force, combinatorics, dp, greedy, implementation, math, two pointers

The Ultimate LIS Problem

data structures, greedy

XOR-ranges

dp, greedy

Become Big For Me

combinatorics, constructive algorithms, greedy, math, number theory

Minimize Inversions Number

data structures, greedy, math, sortings

Rin and The Unknown Flower

constructive algorithms, greedy, interactive, math

Half-sum

brute force, divide and conquer, greedy

Gregor and the Two Painters

data structures, divide and conquer, graphs, greedy, math

Bus Routes

binary search, constructive algorithms, dfs and similar, greedy, trees

I Might Be Wrong

binary search, greedy, two pointers

Outermost Maximums

data structures, greedy

Egor and an RPG game

constructive algorithms, greedy

Tanya is 5!

graph matchings, graphs, greedy, schedules

Nezzar and Tournaments

data structures, greedy

Moving Walkways

data structures, greedy, math

Dreamoon Loves AA

binary search, greedy

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

AmShZ Wins a Bet

data structures, greedy, hashing

A Certain Magical Party

combinatorics, data structures, greedy, sortings

Permutation for Burenka

data structures, graph matchings, greedy, math, trees

Showing Off

flows, graph matchings, greedy, implementation

New Road Network

constructive algorithms, greedy, math

Breadboard Capacity (easy version)

dp, flows, greedy

Rainbow Triples

binary search, data structures, flows, greedy

N Machines

binary search, brute force, greedy

DIY Tree

graphs, greedy, math, probabilities

Organizing a Race

data structures, greedy

Spiders Evil Plan

greedy, trees

An easy problem about trees

dp, games, greedy, trees

JS Minification

greedy, implementation

Two Posters

brute force, data structures, greedy, two pointers

Split

binary search, data structures, dp, greedy

Boring Card Game

data structures, greedy, trees

Qingshan and Daniel

brute force, data structures, greedy, implementation

Clockwork Bomb

data structures, dfs and similar, dsu, greedy, trees

Summer Dichotomy

2-sat, data structures, dfs and similar, greedy

Bear and Bowling

data structures, greedy

To Hack or not to Hack

brute force, dp, greedy

Show Must Go On

binary search, brute force, greedy, shortest paths

Tokitsukaze and Explosion

binary search, greedy

Secret Letters

data structures, dp, greedy

Survival of the Weakest (hard version)

greedy, math, sortings, two pointers

Squid Game

data structures, dfs and similar, greedy, trees

Four Vertices

constructive algorithms, data structures, graphs, greedy, implementation, shortest paths

Computer Game

dp, greedy, math, probabilities

Fishermen

flows, graph matchings, greedy

Madoka and Laziness

dp, greedy

AB Tree

dp, greedy, trees

To Make 1

bitmasks, constructive algorithms, dp, greedy, number theory

Huffman Coding on Segment

data structures, greedy

Raffles

data structures, dp, greedy, math

Captain America

flows, greedy

Flip and Reverse

data structures, graphs, greedy

To Play or not to Play

greedy

PermutationForces

data structures, greedy

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

A Story of One Country (Hard)

brute force, greedy, sortings

Parmigiana With Seafood

binary search, dp, greedy, trees

World of Tank

dp, greedy

The Thorny Path

greedy, math

Berland Miners

binary search, data structures, dfs and similar, greedy, trees

A Stroll Around the Matrix

data structures, greedy, math

Down Below

binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths

Buy One, Get One Free

dp, greedy

The Majestic Brown Tree Snake

dfs and similar, dp, greedy, trees, two pointers

Bear and Rectangle Strips

dp, greedy

Birthday

constructive algorithms, greedy, math

Candies Game

constructive algorithms, greedy

Falling Sand (Hard Version)

dfs and similar, dp, graphs, greedy

Black, White and Grey Tree

binary search, constructive algorithms, dfs and similar, dp, greedy, trees

Lucky Numbers (Hard Version)

dp, greedy

Abandoning Roads

brute force, dp, graphs, greedy

Frequency Problem (Hard Version)

data structures, greedy, two pointers

Fire and Ice

greedy

Heaven Tour

data structures, greedy

Candy Shop

greedy

Restore the Tree

graphs, greedy, trees

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Sheep

binary search, greedy

Chess Championship

constructive algorithms, flows, greedy, math

GCD Master (hard version)

greedy, math, sortings

GCD Master (easy version)

greedy, math, number theory, sortings

Divide Powers

constructive algorithms, greedy

Distinctification

data structures, dsu, greedy

Johnny and James

greedy, implementation, math, trees

Snowy Mountain

data structures, dfs and similar, graphs, greedy, shortest paths, trees

Anti-Increasing Addicts

constructive algorithms, dp, greedy, math

Ones

dp, greedy, shortest paths

Playing Around the Table

constructive algorithms, greedy, implementation

Phys Ed Online

data structures, dp, greedy

Family Photos

games, greedy

Ciel and Flipboard

dp, greedy, math

Lucky Numbers (Easy Version)

dp, greedy

Wonderful Jump

dp, greedy

Pumping Stations

brute force, dfs and similar, divide and conquer, flows, graphs, greedy, trees