Tree-String Problem

*special problem, dfs and similar, hashing, strings

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Polo the Penguin and Trees

combinatorics, dfs and similar, trees

Cow Program

dfs and similar, dp, graphs

Learning Languages

dfs and similar, dsu

Lovely Matrix

dfs and similar, graphs, greedy, sortings

Zero Tree

dfs and similar, dp, greedy, trees

Dominoes

dfs and similar, graphs

Cycle in Graph

dfs and similar, graphs

Circle of Numbers

brute force, dfs and similar, implementation

Little Elephant and Tree

data structures, dfs and similar, trees

Rats

brute force, dfs and similar, graphs, implementation, shortest paths

Text Editor

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

Tree and Table

dfs and similar, dp, implementation, trees

Blood Cousins Return

binary search, data structures, dfs and similar, dp, sortings

Colorful Graph

brute force, dfs and similar, graphs

Undoubtedly Lucky Numbers

bitmasks, brute force, dfs and similar

Colorado Potato Beetle

dfs and similar, implementation

Dispute

dfs and similar, graphs, greedy

King's Path

dfs and similar, graphs, hashing, shortest paths

Road Repairs

dfs and similar, graphs, greedy

World Eater Brothers

dfs and similar, dp, greedy, trees

T-decomposition

dfs and similar, graphs, greedy, trees

Cactus

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

The Road to Berland is Paved With Good Intentions

2-sat, dfs and similar, dsu, graphs

Snake

bitmasks, dfs and similar, graphs, implementation

Choosing Capital for Treeland

dfs and similar, dp, graphs, trees

Bitonix' Patrol

bitmasks, brute force, combinatorics, dfs and similar, math

Ice Skating

brute force, dfs and similar, dsu, graphs

Forming Teams

dfs and similar, implementation

Game

dfs and similar, greedy

IT Restaurants

dfs and similar, dp, trees

Blood Cousins

binary search, data structures, dfs and similar, trees

Solitaire

dfs and similar, dp

Infinite Maze

dfs and similar, graphs

Fools and Roads

data structures, dfs and similar, trees

STL

dfs and similar

Weak Memory

dfs and similar, dsu

Cyclic Coloring

dfs and similar

Party

brute force, dfs and similar, dsu, graphs

Party

dfs and similar, dsu, graphs

Archaeology

data structures, dfs and similar, trees

Chamber of Secrets

dfs and similar, shortest paths

BHTML+BCSS

*special problem, dfs and similar, expression parsing

Wizards and Bets

dfs and similar, graphs, math, matrices

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Variable, or There and Back Again

dfs and similar, graphs

e-Government

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

Distance in Tree

dfs and similar, dp, trees

Edges in MST

dfs and similar, dsu, graphs, sortings

Quantity of Strings

combinatorics, dfs and similar, graphs, math

Missile Silos

data structures, dfs and similar, graphs, shortest paths

Cycle

brute force, dfs and similar, implementation

Pairs of Numbers

brute force, dfs and similar, math, number theory

Subway

dfs and similar, graphs

Students and Shoelaces

brute force, dfs and similar, graphs, implementation

Statues

dfs and similar

Maze

dfs and similar, dp, probabilities, trees

Bertown roads

dfs and similar, graphs

Cycle

dfs and similar, graphs

Party

dfs and similar, graphs, trees

Dorm Water Supply

dfs and similar, graphs

Cthulhu

dfs and similar, dsu, graphs

Battleship

*special problem, dfs and similar, implementation

Leaders

dfs and similar, dsu, graphs, trees

Beautiful Road

dfs and similar, dp, dsu, graphs, implementation, sortings, trees

Petya and Tree

binary search, dfs and similar, probabilities, sortings, trees

General Mobilization

data structures, dfs and similar, sortings

Pairs

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

Beavermuncher-0xFF

dfs and similar, dp, dsu, greedy, trees

Chessboard Billiard

dfs and similar, dsu, graphs, number theory

FreeDiv

dfs and similar, graphs, greedy

Harry Potter and Moving Staircases

dfs and similar, implementation

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Sweets Game

bitmasks, dfs and similar, dp, games, implementation

Wormhouse

dfs and similar, graphs

Eternal Victory

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

Mushroom Strife

brute force, dfs and similar

Serial Time!

dfs and similar, dsu

Square Earth?

dfs and similar, greedy, implementation

Caterpillar

dfs and similar, dp, graphs, trees

Baldman and the military

dfs and similar, graphs, trees

Fire Again

brute force, dfs and similar, shortest paths

Road Map

dfs and similar, graphs

Chocolate

dfs and similar, implementation

Ant on the Tree

constructive algorithms, dfs and similar, trees

Mail Stamps

data structures, dfs and similar, graphs, implementation

pSort

dfs and similar, dsu, graphs

Ring Road 2

2-sat, dfs and similar, dsu, graphs

Tournament

bitmasks, brute force, dfs and similar, greedy

Scheme

dfs and similar, graphs, trees

Fairy

dfs and similar, divide and conquer, dsu

Hierarchy

dfs and similar, dsu, greedy, shortest paths

Two Paths

dfs and similar, dp, graphs, shortest paths, trees, two pointers

Interestring graph and Apples

dfs and similar, dsu, graphs