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

Burenka and Pether

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

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

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

Railway Construction

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

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

BerPaint

geometry, graphs

Spider

geometry, graphs

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

Собери число

graphs, shortest paths

Doremy's Swapping Trees

dfs and similar, graphs, trees

Biome Map

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

Alpha planetary system

constructive algorithms, graphs, shortest paths

Linearization

graphs

Roads Orientation Problem

graphs

Neighbour Ordering

constructive algorithms, graphs

Distance Sum

graphs

Indefinite Clownfish

binary search, graphs

Red-Blue Graph

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

Impressionism

constructive algorithms, graphs, implementation, math

Two Avenues

data structures, dfs and similar, graphs

Arranging Crystal Balls

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

BubbleReactor

dp, graphs

Harder Satisfiability

2-sat, dfs and similar, graphs

Desert

data structures, graphs

Tanya is 5!

graph matchings, graphs, greedy, schedules

Hex Dyslexia

bitmasks, brute force, dp, graphs

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Optimizer

graphs, greedy, hashing, implementation

Knightmare (easy)

graphs, interactive, shortest paths

Balance the Cards

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

Escaping on Beaveractor

graphs

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Planar Perimeter

constructive algorithms, graphs

Dušan's Railway

divide and conquer, graphs, trees

Good Graph

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

Fake bullions

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

Knightmare (hard)

graphs, interactive, shortest paths

Lost Nodes

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

Restore the Tree

graphs, greedy, trees

Nene and the Passing Game

constructive algorithms, data structures, dsu, graphs, sortings

Projectors

flows, graphs

Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Cacti Symphony

combinatorics, dfs and similar, dp, graphs

Deja Vu

constructive algorithms, graphs, implementation

Seollal

graphs

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Poachers

dp, games, graphs, trees

Road Problem

graphs

Tree and Permutation Game

dfs and similar, games, graphs, trees

The Meeting Place Cannot Be Changed

dfs and similar, graphs

Graph Coloring

data structures, graphs, interactive

Privatization

flows, graphs

New Year and Snowy Grid

dfs and similar, dsu, graphs, interactive

Planar Graph

flows, geometry, graphs

Baldman and the military

dfs and similar, graphs, trees

Wizards and Roads

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

Training Camp

flows, graphs

Cactus to Tree

dp, graphs, trees

Journey

data structures, divide and conquer, graphs, trees

Star Trek

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

Harry Vs Voldemort

dfs and similar, dp, graphs, trees

Kevin and Grid

fft, graphs, math

Cactus Not Enough

dfs and similar, graph matchings, graphs

Evidence Board

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

Stock Exchange

binary search, flows, graphs

Tree

fft, graphs, trees

OH NO1 (-2-3-4)

constructive algorithms, graphs, math

Bimatching

graphs

Palindromic Hamiltonian Path

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

JYPnation

graphs

Island Puzzle

dfs and similar, dsu, graphs, trees

Just Add an Edge

dfs and similar, dp, graphs

The Overdosing Ubiquity

brute force, dfs and similar, graphs

Football

graphs

Take Metro

brute force, data structures, graphs

Flower-like Pseudotree

constructive algorithms, graphs, greedy, implementation, trees

Swiper, no swiping!

graphs, implementation

Deputies

constructive algorithms, graphs, greedy, implementation

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

One Billion Shades of Grey

flows, graphs

Grocer's Problem

constructive algorithms, graphs, greedy