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

Unusual Graph

*special problem, graphs

Excursions

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

Nastya and Bees

graphs, interactive, probabilities

Alpha planetary system

constructive algorithms, graphs, shortest paths

Training Camp

flows, graphs

Railway Construction

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

Spider

geometry, graphs

BerPaint

geometry, graphs

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Two Avenues

data structures, dfs and similar, graphs

Graph Decomposition

*special problem, graphs

Public Service

constructive algorithms, graphs, trees

Neighbour Ordering

constructive algorithms, graphs

Chain Letter

*special problem, dfs and similar, graphs

BubbleReactor

dp, graphs

Arranging Crystal Balls

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

Linearization

graphs

Biome Map

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

Roads Orientation Problem

graphs

Distance Sum

graphs

Impressionism

constructive algorithms, graphs, implementation, math

Red-Blue Graph

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

Harder Satisfiability

2-sat, dfs and similar, graphs

Desert

data structures, graphs

Dušan's Railway

divide and conquer, graphs, trees

Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Tanya is 5!

graph matchings, graphs, greedy, schedules

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Knightmare (easy)

graphs, interactive, shortest paths

Optimizer

graphs, greedy, hashing, implementation

Hex Dyslexia

bitmasks, brute force, dp, graphs

Balance the Cards

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

Knightmare (hard)

graphs, interactive, shortest paths

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Deja Vu

constructive algorithms, graphs, implementation

Escaping on Beaveractor

graphs

Restore the Tree

graphs, greedy, trees

Poachers

dp, games, graphs, trees

Projectors

flows, graphs

Planar Perimeter

constructive algorithms, graphs

Fake bullions

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

OH NO1 (-2-3-4)

constructive algorithms, graphs, math

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Seollal

graphs

Lost Nodes

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

Stock Exchange

binary search, flows, graphs

Kevin and Grid

fft, graphs, math

Journey

data structures, divide and conquer, graphs, trees

Tree and Permutation Game

dfs and similar, games, graphs, trees

Football

graphs

Privatization

flows, graphs

New Year and Snowy Grid

dfs and similar, dsu, graphs, interactive

Road Problem

graphs

Cactus to Tree

dp, graphs, trees

Planar Graph

flows, geometry, graphs

Graph Coloring

data structures, graphs, interactive

Gregor and the Two Painters

data structures, divide and conquer, graphs, greedy, math

The Meeting Place Cannot Be Changed

dfs and similar, graphs

Cactus Not Enough

dfs and similar, graph matchings, graphs

One Billion Shades of Grey

flows, graphs

Harry Vs Voldemort

dfs and similar, dp, graphs, trees

Baldman and the military

dfs and similar, graphs, trees

Wizards and Roads

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

JYPnation

graphs

Bimatching

graphs

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

Star Trek

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

Tree

fft, graphs, trees

Maximum Flow

flows, graphs

Jumping Through the Array

binary search, data structures, graphs, two pointers

Palindromic Hamiltonian Path

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

Perpetual Motion Machine

constructive algorithms, dp, graphs, implementation, math, trees

Just Add an Edge

dfs and similar, dp, graphs

Island Puzzle

dfs and similar, dsu, graphs, trees

The Overdosing Ubiquity

brute force, dfs and similar, graphs

Squares

constructive algorithms, data structures, dp, graphs, trees

Swiper, no swiping!

graphs, implementation

Special Edges

flows, graphs

Take Metro

brute force, data structures, graphs

European Trip

dp, graphs, math, matrices

Reindeer Games

binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths

Cycle Palindrome

constructive algorithms, graphs, math

Gold Experience

constructive algorithms, graphs, math, number theory, probabilities

Cross Xor

constructive algorithms, graphs, math, matrices

Deputies

constructive algorithms, graphs, greedy, implementation

Strange Permutation

binary search, combinatorics, data structures, dp, graphs, implementation, two pointers

Grocer's Problem

constructive algorithms, graphs, greedy

Familiar Operations

brute force, graphs, math

MCMF?

data structures, flows, graphs, greedy, sortings, two pointers