Dating

brute force, dfs and similar, graphs, trees

Hyperspace Highways

dfs and similar, graphs, trees

Santa Clauses and a Soccer Championship

constructive algorithms, dfs and similar, graphs, trees

Turtle Magic: Royal Turtle Shell Pattern

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

Beautiful Road

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

Chemistry in Berland

dfs and similar, greedy, trees

Fafa and Ancient Mathematics

dfs and similar, dp, trees

Matching Names

dfs and similar, strings, trees

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Bear and Drawing

constructive algorithms, dfs and similar, trees

Famil Door and Roads

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

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Interestring graph and Apples

dfs and similar, dsu, graphs

Tokens on Graph

constructive algorithms, dfs and similar, graphs, shortest paths

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Bipartite Segments

binary search, data structures, dfs and similar, dsu, graphs, two pointers

City Union

constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math

Light Bulbs (Hard Version)

combinatorics, data structures, dfs and similar, dp, graphs, hashing

Columns Swaps

2-sat, dfs and similar, dsu, graphs, implementation

Graph Cutting

dfs and similar, graphs

Knapsack

dfs and similar, dp, greedy

Infinite Card Game

binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers

Omsk Metro (hard version)

data structures, dfs and similar, divide and conquer, dp, math, trees

Wizard's Tour

constructive algorithms, dfs and similar, graphs

Sasha and the Happy Tree Cutting

bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees

Looksery Party

constructive algorithms, dfs and similar, graphs, greedy

Shortest Path Problem?

dfs and similar, graphs, math

There Should Be a Lot of Maximums

brute force, data structures, dfs and similar, dp, trees, two pointers

Unique Occurrences

data structures, dfs and similar, divide and conquer, dp, dsu, trees

Scheme

dfs and similar, graphs, trees

Sasha and the Wedding Binary Search Tree

brute force, combinatorics, data structures, dfs and similar, math, trees

Company

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

Tree Compass

constructive algorithms, dfs and similar, greedy, trees

Number of Groups

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

Boboniu Walks on Graph

brute force, dfs and similar, graphs, hashing

Alternating Tree

combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Robot on the Board 2

brute force, dfs and similar, graphs, implementation

Tree Queries (Hard Version)

constructive algorithms, dfs and similar, dp, greedy, trees

Pursuit For Artifacts

dfs and similar, dsu, graphs, trees

Dog Snacks

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

The Great Mixing

dfs and similar, graphs, shortest paths

Happy Life in University

data structures, dfs and similar, greedy, trees

Hemose in ICPC ?

binary search, dfs and similar, implementation, interactive, math, number theory, trees

Tourist Reform

dfs and similar, graphs

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

Edges in MST

dfs and similar, dsu, graphs, sortings

LuoTianyi and the Floating Islands (Hard Version)

combinatorics, dfs and similar, math, probabilities, trees

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Centroids

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

Minimal Labels

data structures, dfs and similar, graphs, greedy

Lomsat gelral

data structures, dfs and similar, dsu, trees

Chain Letter

*special problem, dfs and similar, graphs

Suns and Rays

constructive algorithms, dfs and similar, implementation

Suns and Rays

dfs and similar, implementation

BHTML+BCSS

*special problem, dfs and similar, expression parsing

Leaders

dfs and similar, dsu, graphs, trees

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Colorado Potato Beetle

dfs and similar, implementation

Petya and Tree

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

Cyclic Coloring

dfs and similar

Maximum Control (medium)

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

FreeDiv

dfs and similar, graphs, greedy

Ksenia and Pawns

dfs and similar, graphs, implementation, trees

Wrong Floyd

brute force, constructive algorithms, dfs and similar, graphs

Run for beer

dfs and similar, shortest paths

Lucky Number Representation

constructive algorithms, dfs and similar, dp

Snake

bitmasks, dfs and similar, graphs, implementation

Lovely Matrix

dfs and similar, graphs, greedy, sortings

Bribes

dfs and similar, graphs, trees

Valera and Fools

dfs and similar, dp, graphs, shortest paths

Hill Climbing

dfs and similar, geometry, trees

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Three Pieces

dfs and similar, dp, shortest paths

Network Safety

dfs and similar, dsu, graphs, math, sortings

Okabe and City

dfs and similar, graphs, shortest paths

Compressed Tree

dfs and similar, dp, graphs, greedy, sortings, trees

Kirill and Company

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

Vlad and Avoiding X

bitmasks, brute force, dfs and similar, dp, implementation

Graph Coloring

dfs and similar, graphs

Divisors

brute force, dfs and similar, implementation, number theory

AND-MEX Walk

bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs

Demiurges Play Again

dfs and similar, dp, math, trees

Treeland Tour

data structures, dfs and similar, dp, trees

Little Pony and Summer Sun Celebration

constructive algorithms, dfs and similar, graphs

Square Root of Permutation

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

President and Roads

dfs and similar, graphs, hashing, shortest paths

Ice cream coloring

constructive algorithms, dfs and similar, greedy

Hemose on the Tree

bitmasks, constructive algorithms, dfs and similar, trees

Edge Reverse

binary search, dfs and similar, graphs, trees

The Maximum Subtree

dfs and similar, dp, graphs, trees

Railguns

brute force, dfs and similar, dp, graphs

Hamiltonian Spanning Tree

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

Tests for problem D

constructive algorithms, dfs and similar, divide and conquer, trees

Lights

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

Love Triangles

dfs and similar, dsu, graphs

Equidistant Vertices

brute force, combinatorics, dfs and similar, dp, trees

Prefix Function Queries

dfs and similar, dp, hashing, string suffix structures, strings, trees