Paint the Tree

brute force, constructive algorithms, graphs, implementation, trees

The Maximum Subtree

dfs and similar, dp, graphs, trees

Football

graphs

Complete Tripartite

brute force, constructive algorithms, graphs, hashing, implementation

Konrad and Company Evaluation

graphs

Anadi and Domino

brute force, graphs

Tourism

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

Alpha planetary system

constructive algorithms, graphs, shortest paths

Xor Spanning Tree

divide and conquer, fft, graphs

BubbleReactor

dp, graphs

Koala and Notebook

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

Cow and Snacks

dfs and similar, dsu, graphs

Unusual Graph

*special problem, graphs

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Forced Online Queries Problem

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

Coloring Edges

constructive algorithms, dfs and similar, graphs

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Path Queries

divide and conquer, dsu, graphs, sortings, trees

Unstable String Sort

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

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

Graph Traveler

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

Knightmare (hard)

graphs, interactive, shortest paths

Knightmare (easy)

graphs, interactive, shortest paths

Rectangle Painting 2

flows, graph matchings, graphs

Matching vs Independent Set

constructive algorithms, graphs, greedy, sortings

Stock Exchange

binary search, flows, graphs

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Daleks' Invasion (medium)

dfs and similar, graphs, shortest paths, trees

Daleks' Invasion (easy)

graphs, trees

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

Gang Up

flows, graphs

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Cover it!

dfs and similar, dsu, graphs, shortest paths, trees

Recover it!

dfs and similar, graphs, greedy, number theory, sortings

Ehab and the Big Finale

constructive algorithms, divide and conquer, graphs, implementation, interactive, trees

Gold Experience

constructive algorithms, graphs, math, number theory, probabilities

Graph Decomposition

*special problem, graphs

Pairs

graphs, implementation

Vicky's Delivery Service

data structures, dsu, graphs, hashing

News Distribution

dfs and similar, dsu, graphs

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

Indecisive Taxi Fee

data structures, graphs, shortest paths

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Palindrome XOR

dfs and similar, graphs

Hide and Seek

graphs

Optimizer

graphs, greedy, hashing, implementation

Election Promises

games, graphs

Abandoning Roads

brute force, dp, graphs, greedy

Neko and Flashback

constructive algorithms, dfs and similar, graphs

Delivery Oligopoly

brute force, dp, graphs

Zoning Restrictions

dp, flows, graphs

Tree Diameter

bitmasks, graphs, interactive

Graph Without Long Directed Paths

dfs and similar, graphs

Pink Floyd

graphs, interactive

Maximize Mex

flows, graph matchings, graphs

Edgy Trees

dfs and similar, dsu, graphs, math, trees

Privatization of Roads in Treeland

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

Museums Tour

dp, graphs, implementation

Spanning Tree with One Fixed Degree

constructive algorithms, dfs and similar, dsu, graphs, greedy

Spanning Tree with Maximum Degree

graphs

Power Tree

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

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Tree

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

Lunar New Year and a Wander

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

Vasya and Endless Credits

dp, flows, graph matchings, graphs, sortings

MST Unification

binary search, dsu, graphs, greedy

Johnny Solving

constructive algorithms, dfs and similar, graphs, math

Kilani and the Game

dfs and similar, graphs, implementation, shortest paths

Andrew and Taxi

binary search, dfs and similar, graphs

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Construct a tree

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

New Year and the Acquaintance Estimation

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

Make It Connected

dsu, graphs, greedy

Maximum Distance

dsu, graphs, shortest paths, sortings

Beautiful Graph

dfs and similar, graphs

Minegraphed

constructive algorithms, graphs

Harder Satisfiability

2-sat, dfs and similar, graphs

Distance Sum

graphs

Bimatching

graphs

Take Metro

brute force, data structures, graphs

Decorate Apple Tree

constructive algorithms, dfs and similar, dp, graphs, greedy, sortings, trees

Politics

flows, graphs

Upgrading Cities

dfs and similar, graphs

Fun with Integers

dfs and similar, graphs, implementation, math

Edge Deletion

graphs, greedy, shortest paths

Metro

graphs

Multihedgehog

dfs and similar, graphs, shortest paths

Colored Rooks

constructive algorithms, graphs

Familiar Operations

brute force, graphs, math

Privatization of Roads in Berland

flows, graphs

Find a Number

dp, graphs, number theory, shortest paths

Labyrinth

graphs, shortest paths

Vasya and Isolated Vertices

constructive algorithms, graphs

Hidden Bipartite Graph

binary search, constructive algorithms, dfs and similar, graphs, interactive

King Escape

dfs and similar, graphs, implementation

Hyperspace Highways

dfs and similar, graphs, trees

The Shortest Statement

graphs, shortest paths, trees

Leaf Sets

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