Drivers Dissatisfaction

data structures, dsu, graphs, trees

Valera and Fools

dfs and similar, dp, graphs, shortest paths

Bricks

flows, graph matchings, graphs

April Fools' Problem (medium)

binary search, flows, graphs

Sergey's problem

constructive algorithms, graphs

Koala and Notebook

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

Team Rocket Rises Again

data structures, graphs, shortest paths

Card Game

binary search, flows, graphs

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

Best Edge Weight

data structures, dfs and similar, graphs, trees

Jellyfish and Math

bitmasks, brute force, dfs and similar, dp, graphs, shortest paths

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

Tokens on Graph

constructive algorithms, dfs and similar, graphs, shortest paths

Bribes

dfs and similar, graphs, trees

Super Jaber

dfs and similar, graphs, implementation, shortest paths

Disks

dfs and similar, geometry, graph matchings, graphs

Pokémon Arena

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

Axel and Marston in Bitland

bitmasks, dp, graphs, matrices

Magic Matrix

brute force, divide and conquer, graphs, matrices, trees

Capitalism

constructive algorithms, dfs and similar, graphs, shortest paths

Lovely Matrix

dfs and similar, graphs, greedy, sortings

MST Company

binary search, graphs

Xor-matic Number of the Graph

bitmasks, graphs, math, number theory, trees

Roads in the Kingdom

dfs and similar, dp, graphs, trees

Flights

graphs, shortest paths

Interestring graph and Apples

dfs and similar, dsu, graphs

Parametric MST

binary search, constructive algorithms, graphs, greedy, math, sortings

Variable, or There and Back Again

dfs and similar, graphs

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Cats on the Upgrade (easy version)

brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees

Nudist Beach

binary search, graphs, greedy

Common Divisor Graph

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

Rectangle Painting 2

flows, graph matchings, graphs

Flip and Reverse

data structures, graphs, greedy

Antennas

data structures, dfs and similar, graphs, graphs, implementation, implementation, shortest paths, shortest paths

The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

Maximum Matching

bitmasks, brute force, dfs and similar, dp, graphs

Chessboard Billiard

dfs and similar, dsu, graphs, number theory

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Neko and Flashback

constructive algorithms, dfs and similar, graphs

Anti-Palindromize

flows, graphs, greedy

Phoenix and Odometers

dfs and similar, graphs, math, number theory

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Cycling City

dfs and similar, graphs

Snake

bitmasks, dfs and similar, graphs, implementation

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Guard Towers

binary search, dsu, geometry, graphs, sortings

The Chocolate Spree

dfs and similar, dp, graphs, trees

Daleks' Invasion (medium)

dfs and similar, graphs, shortest paths, trees

Fools and Foolproof Roads

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

Double Sort II

dfs and similar, flows, graph matchings, graphs

Similar Sets

data structures, graphs, implementation

Matrix Problem

flows, graphs

Tournament

data structures, graphs

Dependency management

*special problem, graphs, implementation

Trees and XOR Queries Again

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

Machine Programming

flows, graphs

Mother of Dragons

brute force, graphs, math, meet-in-the-middle

Construct a tree

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

Smooth Sailing (Easy Version)

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

Take-off Ramps

graphs, shortest paths

Mobile Phone Network

dfs and similar, dsu, graphs, trees

Shortest Path Queries

bitmasks, data structures, dsu, graphs

Quarrel

graphs, shortest paths

Moving Platforms

graphs, math, number theory, shortest paths

Dividing Kingdom II

brute force, data structures, dsu, graphs, sortings

Ski Base

combinatorics, dsu, graphs

Minimum Modular

brute force, graphs, math, number theory

Approximate Diameter

binary search, divide and conquer, graphs, shortest paths

Beautiful Road

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

Tree

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

Tree Recovery

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

Strange LCS

bitmasks, dp, graphs, greedy, strings

Economic Difficulties

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

Points and Segments

graphs

Christmas Chocolates

dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees

Good Graph

data structures, dsu, graphs, trees

Путь Робота

constructive algorithms, dfs and similar, graphs

Opening Portals

dsu, graphs, shortest paths

Algebra Flash

bitmasks, brute force, dp, graphs, math, meet-in-the-middle, trees

Indecisive Taxi Fee

data structures, graphs, shortest paths

PolandBall and White-Red graph

constructive algorithms, graphs, shortest paths

Playing on Graph

graphs, shortest paths

Lexichromatography

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

Elevator

dp, graphs, shortest paths

Clearing Up

constructive algorithms, dp, dsu, graphs

Off by One

constructive algorithms, dfs and similar, geometry, graphs, sortings, trees

Nastya and Time Machine

constructive algorithms, dfs and similar, graphs, trees

The Coronation

graphs, implementation

Singer House

combinatorics, dp, graphs, trees

Preorder Test

binary search, dfs and similar, dp, graphs, greedy, trees

Petya and Pipes

flows, graphs, shortest paths

Tree Queries

data structures, dfs and similar, graphs, implementation, trees

Zoning Restrictions

dp, flows, graphs

Vladik and Entertaining Flags

data structures, dsu, graphs

Traveling Graph

bitmasks, graph matchings, graphs

XOR, Tree, and Queries

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

Johnny Solving

constructive algorithms, dfs and similar, graphs, math

Tick, Tock

combinatorics, dfs and similar, dsu, graphs