Minimal Height Tree

graphs, greedy, shortest paths, trees

Split Into Two Sets

dfs and similar, dsu, graphs

Fox And Names

dfs and similar, graphs, sortings

Party

brute force, dfs and similar, dsu, graphs

Party

dfs and similar, dsu, graphs

Online Courses In BSU

*special problem, dfs and similar, graphs, implementation

Resort

graphs

PFAST Inc.

bitmasks, brute force, graphs

Brain Network (medium)

dfs and similar, graphs, trees

Hide and Seek

graphs

Searching for Graph

brute force, constructive algorithms, graphs

Coach

brute force, dfs and similar, graphs

Peculiar apple-tree

dfs and similar, graphs, trees

Ping-Pong (Easy Version)

dfs and similar, graphs

Bear and Three Musketeers

brute force, dfs and similar, graphs, hashing

Hongcow Builds A Nation

dfs and similar, graphs

Cthulhu

dfs and similar, dsu, graphs

Nastya and Potions

dfs and similar, dp, graphs, sortings

Pairs

graphs, implementation

Cut 'em all!

dfs and similar, dp, graphs, greedy, trees

Edgy Trees

dfs and similar, dsu, graphs, math, trees

Unforgivable Curse (hard version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings

Secret Passwords

dfs and similar, dsu, graphs

Minimum Ties

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math

NP-Hard Problem

dfs and similar, graphs

Lunar New Year and a Wander

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

Cyclic Permutations

combinatorics, dp, graphs, math

Bear and Friendship Condition

dfs and similar, dsu, graphs

Running for Gold

combinatorics, graphs, greedy, sortings

Journey

dfs and similar, dp, graphs, probabilities, trees

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

Cyclic Components

dfs and similar, dsu, graphs

Kefa and Park

dfs and similar, graphs, trees

Obsession with Robots

constructive algorithms, graphs, implementation

Send the Fool Further! (easy)

dfs and similar, graphs, trees

Football

constructive algorithms, graphs, implementation

Ring road

graphs

Dorm Water Supply

dfs and similar, graphs

Strongly Connected City

brute force, dfs and similar, graphs, implementation

Doremy's City Construction

graphs, greedy

Set Construction

constructive algorithms, dfs and similar, graphs, greedy

Where is the Pizza?

data structures, dfs and similar, dsu, graphs, implementation, math

Phase Shift

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

Anonymous Informant

brute force, dfs and similar, graphs, implementation

Mr. Kitayuta's Colorful Graph

dfs and similar, dp, dsu, graphs

Unforgivable Curse (easy version)

brute force, constructive algorithms, dsu, graphs, greedy, strings

Copil Copac Draws Trees

dfs and similar, dp, graphs, trees

Mocha and Diana (Easy Version)

brute force, constructive algorithms, dsu, graphs, greedy, trees

The Child and Toy

graphs, greedy, sortings

Great Graphs

constructive algorithms, graphs, greedy, shortest paths, sortings

Productive Meeting

constructive algorithms, graphs, greedy

Web of Lies

brute force, graphs, greedy

News Distribution

dfs and similar, dsu, graphs

Ball in Berland

combinatorics, graphs, math

Two Buttons

dfs and similar, graphs, greedy, implementation, math, shortest paths

Friends

graphs, implementation, math

Dividing the numbers

constructive algorithms, graphs, math

Vasya and Isolated Vertices

constructive algorithms, graphs

PolandBall and Forest

dfs and similar, dsu, graphs, interactive, trees

Jatayu's Balanced Bracket Sequence

data structures, dsu, graphs, greedy

Little Alawn's Puzzle

combinatorics, dp, dsu, graphs, math

Vertical Paths

graphs, implementation, trees

Bakery

graphs

Party

brute force, graphs

White-Black Balanced Subtrees

dfs and similar, dp, graphs, trees

Arrow Path

brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths

Inversion Graph

data structures, dsu, graphs, math

Masha and a Beautiful Tree

dfs and similar, divide and conquer, graphs, sortings, trees

Mahmoud and Ehab and the bipartiteness

dfs and similar, graphs, trees

Forever Winter

dfs and similar, graphs, math

Road Construction

constructive algorithms, graphs

Getting Zero

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

Rumor

dfs and similar, graphs, greedy

Polygon

dp, graphs, implementation, shortest paths

King's Task

brute force, graphs, implementation

Network Topology

graphs, implementation

Simple Molecules

brute force, graphs, math

Diameter of Graph

constructive algorithms, graphs, greedy, math

Students and Shoelaces

brute force, dfs and similar, graphs, implementation

Belted Rooms

graphs, implementation

Madoka and the Elegant Gift

brute force, constructive algorithms, graphs, implementation

Reposts

*special problem, dfs and similar, dp, graphs, trees

Princesses and Princes

brute force, graphs, greedy

Mocha and Hiking

constructive algorithms, graphs

Ice Skating

brute force, dfs and similar, dsu, graphs

Путь Робота

constructive algorithms, dfs and similar, graphs

Rook, Bishop and King

graphs, math, shortest paths

Fridge Lockers

graphs, implementation

The Lakes

dfs and similar, dsu, graphs, implementation

Long Jumps

dp, graphs

King Escape

dfs and similar, graphs, implementation

Badge

brute force, dfs and similar, graphs

New Year Transportation

dfs and similar, graphs, implementation

Metro

graphs

Protect Sheep

brute force, dfs and similar, graphs, implementation

Party

dfs and similar, graphs, trees

Li Hua and Maze

constructive algorithms, flows, graphs, greedy, implementation

PolandBall and Hypothesis

brute force, graphs, math, number theory

Destroying Bridges

graphs, greedy, math

Gregor and the Pawn Game

dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation