Kirill and Company

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

Compressed Tree

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

Okabe and City

dfs and similar, graphs, shortest paths

Network Safety

dfs and similar, dsu, graphs, math, sortings

Three Pieces

dfs and similar, dp, shortest paths

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Hill Climbing

dfs and similar, geometry, trees

Valera and Fools

dfs and similar, dp, graphs, shortest paths

Bribes

dfs and similar, graphs, trees

Lovely Matrix

dfs and similar, graphs, greedy, sortings

Snake

bitmasks, dfs and similar, graphs, implementation

Lucky Number Representation

constructive algorithms, dfs and similar, dp

Run for beer

dfs and similar, shortest paths

Wrong Floyd

brute force, constructive algorithms, dfs and similar, graphs

Ksenia and Pawns

dfs and similar, graphs, implementation, trees

Maximum Control (medium)

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

FreeDiv

dfs and similar, graphs, greedy

Cyclic Coloring

dfs and similar

Petya and Tree

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

Colorado Potato Beetle

dfs and similar, implementation

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Leaders

dfs and similar, dsu, graphs, trees

Min-Fund Prison (Medium)

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

BHTML+BCSS

*special problem, dfs and similar, expression parsing

Suns and Rays

dfs and similar, implementation

Suns and Rays

constructive algorithms, dfs and similar, implementation

Chain Letter

*special problem, dfs and similar, graphs

Lomsat gelral

data structures, dfs and similar, dsu, trees

Centroids

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

Minimal Labels

data structures, dfs and similar, graphs, greedy

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Dogeforces

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

LuoTianyi and the Floating Islands (Hard Version)

combinatorics, dfs and similar, math, probabilities, trees

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

Tourist Reform

dfs and similar, graphs

Pattern Matching

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

Hemose in ICPC ?

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

Happy Life in University

data structures, dfs and similar, greedy, trees

The Great Mixing

dfs and similar, graphs, shortest paths

Dog Snacks

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

Pursuit For Artifacts

dfs and similar, dsu, graphs, trees

Tree Queries (Hard Version)

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

Robot on the Board 2

brute force, dfs and similar, graphs, implementation

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Alternating Tree

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

Tree Compass

constructive algorithms, dfs and similar, greedy, trees

Boboniu Walks on Graph

brute force, dfs and similar, graphs, hashing

Number of Groups

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

Company

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

Sasha and the Wedding Binary Search Tree

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

Scheme

dfs and similar, graphs, trees

Unique Occurrences

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

There Should Be a Lot of Maximums

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

Sasha and the Happy Tree Cutting

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

Shortest Path Problem?

dfs and similar, graphs, math

Omsk Metro (hard version)

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

Wizard's Tour

constructive algorithms, dfs and similar, graphs

Looksery Party

constructive algorithms, dfs and similar, graphs, greedy

Infinite Card Game

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

Knapsack

dfs and similar, dp, greedy

Graph Cutting

dfs and similar, graphs

Columns Swaps

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

Light Bulbs (Hard Version)

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

City Union

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

Bipartite Segments

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

wxhtzdy ORO Tree

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

Tokens on Graph

constructive algorithms, dfs and similar, graphs, shortest paths

Graph Traveler

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

Interestring graph and Apples

dfs and similar, dsu, graphs

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Famil Door and Roads

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

Bear and Drawing

constructive algorithms, dfs and similar, trees

Turtle Magic: Royal Turtle Shell Pattern

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

Matching Names

dfs and similar, strings, trees

Fafa and Ancient Mathematics

dfs and similar, dp, trees

Chemistry in Berland

dfs and similar, greedy, trees

Beautiful Road

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

Santa Clauses and a Soccer Championship

constructive algorithms, dfs and similar, graphs, trees

Hyperspace Highways

dfs and similar, graphs, trees

Dating

brute force, dfs and similar, graphs, trees

Rats

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

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

Wormhouse

dfs and similar, graphs

Tree and Queries

data structures, dfs and similar, trees

Blood Cousins Return

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

XOR Tree

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

Fib-tree

brute force, dfs and similar, divide and conquer, number theory, trees

Mr. Kitayuta's Colorful Graph

brute force, dfs and similar, dsu, graphs

Nastya and Unexpected Guest

dfs and similar, dp, graphs, shortest paths

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

Catowice City

2-sat, dfs and similar, graph matchings, graphs

MEX Tree

combinatorics, dfs and similar, implementation, math, trees

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

Great Grids

2-sat, constructive algorithms, dfs and similar, dsu, graphs

The Beach

constructive algorithms, dfs and similar, graphs, shortest paths

Cactus Wall

constructive algorithms, dfs and similar, graphs, shortest paths

Fair Share

constructive algorithms, data structures, dfs and similar, graph matchings, graphs

Graph Transpositions

dfs and similar, graphs, greedy, shortest paths

Tree Destruction

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