Burenka and Pether

*special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees

Parallel Universes

*special problem, constructive algorithms, dfs and similar, dsu, graphs

MUH and Lots and Lots of Segments

data structures, dsu

Visible Black Areas

data structures, dsu, geometry, trees

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Entertaining Geodetics

brute force, dsu, implementation

A Convex Game

dsu, games

Dangerous Laser Power

constructive algorithms, dsu, sortings

Inna and Babies

binary search, data structures, dsu, geometry, implementation

Iqea

data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees

Imitating the Key Tree

combinatorics, dsu, trees

New Year and Snowy Grid

dfs and similar, dsu, graphs, interactive

Flow Control

data structures, dsu, implementation

Nene and the Passing Game

constructive algorithms, data structures, dsu, graphs, sortings

Bakery

data structures, dsu

Island Puzzle

dfs and similar, dsu, graphs, trees

Send Tree to Charlie

combinatorics, dfs and similar, dsu, trees

School

dp, dsu

Cycle sort

dsu, math

Alien DNA

data structures, dsu, trees

Gates to Another World

bitmasks, data structures, dsu, two pointers

Hercule Poirot Problem

dsu, graphs

Building Forest Trails

data structures, dsu

Pairs

dfs and similar, dp, dsu, graphs, implementation, trees

Li Hua and Path

data structures, dfs and similar, divide and conquer, dsu, trees

Appleman and Complicated Task

dsu, math

Distinctification

data structures, dsu, greedy

Andrey's Tree

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

Leaders

dfs and similar, dsu, graphs, trees

Air Reform

data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees

Dima and Kicks

brute force, dsu, graphs, implementation

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Savior

brute force, dsu, math

Edge Queries

data structures, dfs and similar, dp, dsu, graphs, trees

Permutation Weight (Easy Version)

constructive algorithms, dfs and similar, dsu

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

Gasoline prices

data structures, divide and conquer, dsu, hashing, trees

Communication Towers

brute force, divide and conquer, dsu

Cutting a Fence

binary search, data structures, dsu

...Wait for it...

data structures, dsu, trees

Rain of Fire

binary search, data structures, dfs and similar, dsu, graphs, implementation

Timofey and our friends animals

data structures, divide and conquer, dsu

Reclamation

dsu

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Two Paths

constructive algorithms, dsu, graphs, implementation

Virus

data structures, divide and conquer, dsu, graphs

Number of Components

dsu, implementation

Forced Online Queries Problem

data structures, divide and conquer, dsu, graphs, trees

Ilya and Two Numbers

constructive algorithms, data structures, dsu, greedy

Words on Tree

2-sat, dfs and similar, dsu, graphs, trees

Cute number

binary search, brute force, data structures, dsu, implementation, math

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

Cow and Vacation

dfs and similar, dsu, trees

Occurrences

combinatorics, dfs and similar, dp, dsu, fft, graphs

Kingdom of Criticism

data structures, dsu

Clockwork Bomb

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

Lenient Vertex Cover

dfs and similar, divide and conquer, dsu, graphs, trees

Jumping Around

binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths

Alice and the Unfair Game

binary search, data structures, dp, dsu

Campus

binary search, data structures, dsu, trees

Access Levels

bitmasks, dsu, flows, graph matchings

Delicious Dessert

binary search, dsu, hashing, math, number theory, string suffix structures

Binary Matrix

dsu

Vicky's Delivery Service

data structures, dsu, graphs, hashing

Building Forest

data structures, dsu, graphs

Trails and Glades

constructive algorithms, dsu, graphs, greedy

One-Four Overload

2-sat, constructive algorithms, dfs and similar, dsu, graphs, implementation

DZY Loves Planting

binary search, dsu, trees

The Red Button

combinatorics, dfs and similar, dsu, graphs, greedy

Tick, Tock

combinatorics, dfs and similar, dsu, graphs

XOR, Tree, and Queries

bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees

Split

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

Clearing Up

constructive algorithms, dp, dsu, graphs

Lexichromatography

combinatorics, dfs and similar, dsu, graphs, two pointers

Groceries in Meteor Town

binary search, data structures, dsu, trees

Opening Portals

dsu, graphs, shortest paths

Good Graph

data structures, dsu, graphs, trees

Vladik and Entertaining Flags

data structures, dsu, graphs

DSU Master

combinatorics, dp, dsu, math

Tree Recovery

brute force, constructive algorithms, dfs and similar, dsu, graphs, trees

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Peterson Polyglot

brute force, dfs and similar, dsu, hashing, strings, trees

Dividing Kingdom II

brute force, data structures, dsu, graphs, sortings

Ski Base

combinatorics, dsu, graphs

Shortest Path Queries

bitmasks, data structures, dsu, graphs

Mobile Phone Network

dfs and similar, dsu, graphs, trees

Smooth Sailing (Easy Version)

binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths

Doremy's Experimental Tree

brute force, constructive algorithms, dfs and similar, dsu, sortings, trees

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

Fools and Foolproof Roads

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

Guard Towers

binary search, dsu, geometry, graphs, sortings

Narrow Components

brute force, data structures, dp, dsu, math, trees

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Chessboard Billiard

dfs and similar, dsu, graphs, number theory

Deduction Queries

data structures, dsu

Common Divisor Graph

brute force, constructive algorithms, dsu, graphs, hashing, math, number theory

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Beavermuncher-0xFF

dfs and similar, dp, dsu, greedy, trees

Vasya and Maximum Profit

binary search, constructive algorithms, data structures, dp, dsu