Swaps in Permutation

dfs and similar, dsu, math

Brain Network (medium)

dfs and similar, graphs, trees

Mike and Shortcuts

dfs and similar, graphs, greedy, shortest paths

TOF

dfs and similar, graphs

NP-Hard Problem

dfs and similar, graphs

Kay and Snowflake

data structures, dfs and similar, dp, trees

Alyona and the Tree

dfs and similar, dp, graphs, trees

Gifts by the List

constructive algorithms, dfs and similar, graphs, trees

Bear and Chase

brute force, dfs and similar, graphs, implementation, math, probabilities

Bear and Square Grid

dfs and similar, dsu, implementation

Graph Coloring

dfs and similar, graphs

Polycarp and Hay

dfs and similar, dsu, graphs, greedy, sortings

New Reform

data structures, dfs and similar, dsu, graphs, greedy

Bear and Forgotten Tree 2

dfs and similar, dsu, graphs, trees

Bear and Compressing

brute force, dfs and similar, dp, strings

Pursuit For Artifacts

dfs and similar, dsu, graphs, trees

Clockwork Bomb

data structures, dfs and similar, dsu, greedy, trees

Table Compression

dfs and similar, dp, dsu, graphs, greedy

Путь Робота

constructive algorithms, dfs and similar, graphs

Bear and Chemistry

data structures, dfs and similar, graphs, trees

Three-dimensional Turtle Super Computer

brute force, dfs and similar, graphs

Road Improvement

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

Making Genome in Berland

*special problem, dfs and similar, strings

Yash And Trees

bitmasks, data structures, dfs and similar, math, number theory

The Chocolate Spree

dfs and similar, dp, graphs, trees

Famil Door and Roads

combinatorics, data structures, dfs and similar, dp, probabilities, trees

Island Puzzle

dfs and similar, dsu, graphs, trees

Preorder Test

binary search, dfs and similar, dp, graphs, greedy, trees

Ants in Leaves

dfs and similar, greedy, sortings, trees

Hamiltonian Spanning Tree

dfs and similar, dp, graph matchings, greedy, trees

The Labyrinth

dfs and similar

Kingdom and its Cities

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

Square Root of Permutation

combinatorics, constructive algorithms, dfs and similar, graphs, math

Minimum spanning tree for each edge

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

Board Game

data structures, dfs and similar

Moodular Arithmetic

combinatorics, dfs and similar, dsu, math, number theory

Acyclic Organic Compounds

data structures, dfs and similar, dsu, hashing, strings, trees

Lomsat gelral

data structures, dfs and similar, dsu, trees

Igor In the Museum

dfs and similar, graphs, shortest paths

Wilbur and Strings

dfs and similar, dp, graphs, strings

Happy Tree Party

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

Super M

dfs and similar, dp, graphs, trees

Three States

dfs and similar, graphs, shortest paths

Phillip and Trains

dfs and similar, graphs, shortest paths

Kefa and Park

dfs and similar, graphs, trees

Invariance of Tree

constructive algorithms, dfs and similar, greedy, trees

Run for beer

dfs and similar, shortest paths

Bribes

dfs and similar, graphs, trees

Bear and Three Musketeers

brute force, dfs and similar, graphs, hashing

Bear and Drawing

constructive algorithms, dfs and similar, trees

CNF 2

constructive algorithms, dfs and similar, graphs, greedy

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

President and Roads

dfs and similar, graphs, hashing, shortest paths

Logistical Questions

dfs and similar, divide and conquer, trees

Matching Names

dfs and similar, strings, trees

Vitaly and Cycle

combinatorics, dfs and similar, graphs, math

Case of Computer Network

dfs and similar, graphs, trees

Love Triangles

dfs and similar, dsu, graphs

Looksery Party

constructive algorithms, dfs and similar, graphs, greedy

Mike and Fish

constructive algorithms, dfs and similar, graphs

Soldier and Cards

brute force, dfs and similar, games

Superhero's Job

dfs and similar, dp, hashing, math, number theory

Ice Cave

dfs and similar

Summer Dichotomy

2-sat, data structures, dfs and similar, greedy

Demiurges Play Again

dfs and similar, dp, math, trees

Work Group

dfs and similar, dp, graphs, strings, trees

Berland Miners

binary search, data structures, dfs and similar, greedy, trees

Data Center Drama

dfs and similar, graphs

Om Nom and Dark Park

dfs and similar, greedy, implementation

Reposts

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

Cycling City

dfs and similar, graphs

Two Buttons

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

A and B and Lecture Rooms

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

Drazil and Morning Exercise

dfs and similar, dp, dsu, trees, two pointers

Inversions problem

brute force, dfs and similar, dp, meet-in-the-middle

Constrained Tree

dfs and similar

Fox And Names

dfs and similar, graphs, sortings

Fox And Two Dots

dfs and similar

Tanya and Password

dfs and similar, graphs

Breaking Good

dfs and similar, dp, graphs, shortest paths

Mr. Kitayuta's Colorful Graph

brute force, dfs and similar, dsu, graphs

Mr. Kitayuta's Technology

dfs and similar

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

Mr. Kitayuta's Colorful Graph

dfs and similar, dp, dsu, graphs

Misha and LCP on Tree

binary search, dfs and similar, hashing, string suffix structures, trees

New Year Santa Network

combinatorics, dfs and similar, graphs, trees

New Year Permutation

dfs and similar, dsu, graphs, greedy, math, sortings

New Year Transportation

dfs and similar, graphs, implementation

Birthday

data structures, dfs and similar, dp, trees

Treeland Tour

data structures, dfs and similar, dp, trees

Chocolate

brute force, dfs and similar, math, meet-in-the-middle, number theory

Unbearable Controversy of Being

brute force, combinatorics, dfs and similar, graphs

BerSU Ball

dfs and similar, dp, graph matchings, greedy, sortings, two pointers

Tourists

data structures, dfs and similar, graphs, trees

Valid Sets

dfs and similar, dp, math, trees

Wavy numbers

brute force, dfs and similar, meet-in-the-middle, sortings

Strongly Connected City 2

dfs and similar

Strongly Connected City

brute force, dfs and similar, graphs, implementation

Design Tutorial: Inverse the Problem

dfs and similar, dsu, shortest paths, trees

Two Sets

2-sat, dfs and similar, dsu, graph matchings, greedy