Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Treasure Hunt

graphs, interactive

Equal Trees

*special problem, graphs, meet-in-the-middle

Burenka and Pether

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

Unusual Graph

*special problem, graphs

Loader

*special problem, graphs

Excursions

*special problem, constructive algorithms, dfs and similar, flows, graph matchings, graphs

Nastya and Bees

graphs, interactive, probabilities

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

BerPaint

geometry, graphs

Spider

geometry, graphs

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Graph Decomposition

*special problem, graphs

Public Service

constructive algorithms, graphs, trees

Chain Letter

*special problem, dfs and similar, graphs

Standard Graph Problem

data structures, graphs, greedy, trees

Parallel Universes

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

Future Dominators

graphs, greedy

Biome Map

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

Linearization

graphs

Alpha planetary system

constructive algorithms, graphs, shortest paths

Roads Orientation Problem

graphs

Distance Sum

graphs

Neighbour Ordering

constructive algorithms, graphs

Red-Blue Graph

dp, graphs, math, matrices, meet-in-the-middle

Doremy's Swapping Trees

dfs and similar, graphs, trees

Impressionism

constructive algorithms, graphs, implementation, math

Two Avenues

data structures, dfs and similar, graphs

Harder Satisfiability

2-sat, dfs and similar, graphs

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

Desert

data structures, graphs

Hex Dyslexia

bitmasks, brute force, dp, graphs

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Tanya is 5!

graph matchings, graphs, greedy, schedules

Let Me Teach You a Lesson (Hard Version)

bitmasks, data structures, dp, graphs, matrices, two pointers

Собери число

graphs, shortest paths

BubbleReactor

dp, graphs

Indefinite Clownfish

binary search, graphs

Knightmare (easy)

graphs, interactive, shortest paths

Optimizer

graphs, greedy, hashing, implementation

Planar Perimeter

constructive algorithms, graphs

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Escaping on Beaveractor

graphs

Balance the Cards

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation

Dušan's Railway

divide and conquer, graphs, trees

Knightmare (hard)

graphs, interactive, shortest paths

Lost Nodes

constructive algorithms, dp, graphs, interactive, sortings, trees

Restore the Tree

graphs, greedy, trees

Good Graph

bitmasks, dfs and similar, graph matchings, graphs, implementation

Fake bullions

combinatorics, dfs and similar, dp, graphs, number theory

Deja Vu

constructive algorithms, graphs, implementation

Seollal

graphs

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Poachers

dp, games, graphs, trees

Road Problem

graphs

Projectors

flows, graphs

Cacti Symphony

combinatorics, dfs and similar, dp, graphs

Graph Coloring

data structures, graphs, interactive

Tree and Permutation Game

dfs and similar, games, graphs, trees

The Meeting Place Cannot Be Changed

dfs and similar, graphs

New Year and Snowy Grid

dfs and similar, dsu, graphs, interactive

Planar Graph

flows, geometry, graphs

Wizards and Roads

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

Cactus to Tree

dp, graphs, trees

Baldman and the military

dfs and similar, graphs, trees

Privatization

flows, graphs

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Journey

data structures, divide and conquer, graphs, trees

Kevin and Grid

fft, graphs, math

Harry Vs Voldemort

dfs and similar, dp, graphs, trees

Cactus Not Enough

dfs and similar, graph matchings, graphs

Tree

fft, graphs, trees

Evidence Board

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

Bimatching

graphs

OH NO1 (-2-3-4)

constructive algorithms, graphs, math

Stock Exchange

binary search, flows, graphs

Training Camp

flows, graphs

Palindromic Hamiltonian Path

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

Island Puzzle

dfs and similar, dsu, graphs, trees

JYPnation

graphs

The Overdosing Ubiquity

brute force, dfs and similar, graphs

Football

graphs

Take Metro

brute force, data structures, graphs

Deputies

constructive algorithms, graphs, greedy, implementation

Swiper, no swiping!

graphs, implementation

Kostyanych's Theorem

brute force, constructive algorithms, graphs, interactive

Flower-like Pseudotree

constructive algorithms, graphs, greedy, implementation, trees

Grocer's Problem

constructive algorithms, graphs, greedy

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math