Slime and Hats

constructive algorithms, dp, greedy

Kuroni the Private Tutor

binary search, greedy

Balanced Distribution

data structures, dp, greedy

XOR-ranges

dp, greedy

Minimize Inversions Number

data structures, greedy, math, sortings

Rin and The Unknown Flower

constructive algorithms, greedy, interactive, math

Gregor and the Two Painters

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

Egor and an RPG game

constructive algorithms, greedy

Nezzar and Tournaments

data structures, greedy

Tanya is 5!

graph matchings, graphs, greedy, schedules

Moving Walkways

data structures, greedy, math

Dreamoon Loves AA

binary search, greedy

AmShZ Wins a Bet

data structures, greedy, hashing

DIY Tree

graphs, greedy, math, probabilities

New Road Network

constructive algorithms, greedy, math

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

Showing Off

flows, graph matchings, greedy, implementation

Breadboard Capacity (easy version)

dp, flows, greedy

Rainbow Triples

binary search, data structures, flows, greedy

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

Boring Card Game

data structures, greedy, trees

Split

binary search, data structures, dp, greedy

Qingshan and Daniel

brute force, data structures, greedy, implementation

Summer Dichotomy

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

Clockwork Bomb

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

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

Secret Letters

data structures, dp, greedy

Tokitsukaze and Explosion

binary search, greedy

Squid Game

data structures, dfs and similar, greedy, trees

Computer Game

dp, greedy, math, probabilities

Madoka and Laziness

dp, greedy

Four Vertices

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

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

World of Tank

dp, greedy

The Thorny Path

greedy, math

Berland Miners

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

Buy One, Get One Free

dp, greedy

A Stroll Around the Matrix

data structures, greedy, math

Down Below

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

The Majestic Brown Tree Snake

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

Birthday

constructive algorithms, greedy, math

Bear and Rectangle Strips

dp, greedy

Candies Game

constructive algorithms, greedy

Black, White and Grey Tree

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

Falling Sand (Hard Version)

dfs and similar, dp, graphs, greedy

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

Sheep

binary search, greedy

Chess Championship

constructive algorithms, flows, greedy, math

Snowy Mountain

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

Distinctification

data structures, dsu, greedy

Divide Powers

constructive algorithms, greedy

Playing Around the Table

constructive algorithms, greedy, implementation

Johnny and James

greedy, implementation, math, trees

Family Photos

games, greedy

Ones

dp, greedy, shortest paths

Phys Ed Online

data structures, dp, greedy

Ciel and Flipboard

dp, greedy, math

Lucky Numbers (Easy Version)

dp, greedy

Pumping Stations

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

Subsequence

brute force, divide and conquer, dp, greedy, trees

GCD Groups 2

greedy, number theory, probabilities

Omkar and Last Floor

dp, greedy, two pointers

Roads in Yusland

data structures, dp, greedy

Goods transportation

dp, flows, greedy

Mr. Kitayuta vs. Bamboos

binary search, greedy

Snow sellers

greedy, sortings

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Ordering T-Shirts

greedy

Sequence Recovery

bitmasks, data structures, greedy

Kojiro and Furrari

dp, greedy

Frog Fights

data structures, greedy

Forward, march!

binary search, dp, greedy

Bridge Club

flows, graph matchings, graphs, greedy

Tournament Construction

constructive algorithms, dp, graphs, greedy, math

Road Repairs

dfs and similar, graphs, greedy

Alice and Recoloring 2

constructive algorithms, flows, graph matchings, greedy

Bipartite Array

dp, greedy

String and Operations

dp, greedy

The Next Good String

data structures, greedy, hashing, strings