The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

Flights

graphs, shortest paths

Xor-matic Number of the Graph

bitmasks, graphs, math, number theory, trees

Roads in the Kingdom

dfs and similar, dp, graphs, trees

Graph Traveler

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

Lovely Matrix

dfs and similar, graphs, greedy, sortings

MST Company

binary search, graphs

Capitalism

constructive algorithms, dfs and similar, graphs, shortest paths

Axel and Marston in Bitland

bitmasks, dp, graphs, matrices

Magic Matrix

brute force, divide and conquer, graphs, matrices, trees

Bribes

dfs and similar, graphs, trees

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

Tokens on Graph

constructive algorithms, dfs and similar, graphs, shortest paths

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

Best Edge Weight

data structures, dfs and similar, graphs, trees

Team Rocket Rises Again

data structures, graphs, shortest paths

Jellyfish and Math

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

Sergey's problem

constructive algorithms, graphs

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Super Jaber

dfs and similar, graphs, implementation, shortest paths

Valera and Fools

dfs and similar, dp, graphs, shortest paths

Card Game

binary search, flows, graphs

Bricks

flows, graph matchings, graphs

Idempotent functions

constructive algorithms, graphs, math

Koala and Notebook

data structures, dfs and similar, graphs, shortest paths, strings, trees

April Fools' Problem (medium)

binary search, flows, graphs

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Distance Tree (easy version)

binary search, data structures, dfs and similar, graphs, shortest paths, trees

Bipartite Segments

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

Knights

geometry, graphs, shortest paths, sortings

Coloring

brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math

Tree Queries

dfs and similar, graphs, trees

ANDfinity

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

Rectangle Painting 2

flows, graph matchings, graphs

Connectivity Addicts

constructive algorithms, dsu, graphs, greedy, interactive, shortest paths, trees

Museums Tour

dp, graphs, implementation

Disks

dfs and similar, geometry, graph matchings, graphs

Dima and Horses

combinatorics, constructive algorithms, graphs

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Happy Tree Party

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

Hydra

graphs, sortings

Party

bitmasks, brute force, dp, graphs

Interactive Game with Coloring

brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees

Vulnerable Kerbals

constructive algorithms, dp, graphs, math, number theory

k-Maximum Subsequence Sum

data structures, flows, graphs, implementation

BFS Trees

combinatorics, dfs and similar, graphs, math, shortest paths, trees

Hospital Queue

binary search, graphs, greedy, implementation

Falling Sand (Easy Version)

dfs and similar, graphs, greedy

Bug in Code

data structures, graphs, implementation, two pointers

Removing Graph

brute force, dp, games, graphs, math

Break Up

dfs and similar, graphs

Bipartite Checking

data structures, dsu, graphs

Simple Cycles Edges

dfs and similar, graphs, trees

Light Bulbs (Hard Version)

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

Leaf Sets

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

The Hidden Pair (Hard Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

Royal Questions

dsu, graphs, greedy

Power Tree

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

Circular Maze

brute force, dfs and similar, graphs, implementation

The Classic Problem

data structures, graphs, shortest paths

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Network Safety

dfs and similar, dsu, graphs, math, sortings

Black and White Tree

constructive algorithms, dsu, graphs, greedy, trees

New Roads

constructive algorithms, graphs, trees

Columns Swaps

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

Tourism

dp, graphs, probabilities

Graph Cutting

dfs and similar, graphs

Okabe and City

dfs and similar, graphs, shortest paths

Dominoes

combinatorics, fft, graphs, math, number theory

Graph Subset Problem

constructive algorithms, data structures, graphs

Routing

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

The Hidden Pair (Easy Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

New Year and Rainbow Roads

graphs, greedy, implementation

Compressed Tree

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

Bear and Forgotten Tree 2

dfs and similar, dsu, graphs, trees

Orientation of Edges

dfs and similar, graphs

Johnny and Megan's Necklace

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

It's a bird! No, it's a plane! No, it's AaParsa!

constructive algorithms, graphs, shortest paths

President's Path

dp, graphs, shortest paths

Lucky Country

dp, dsu, graphs

DFS Trees

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

Purple Crayon

data structures, dfs and similar, games, graphs, greedy, math, sortings, trees

Complete the MST

bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees

Kirill and Company

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

Konrad and Company Evaluation

graphs

Pairs of Pairs

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

Counter Attack

data structures, dsu, graphs, hashing, sortings

st-Spanning Tree

dsu, graphs, greedy, implementation

Arson In Berland Forest

binary search, graphs, graphs, shortest paths

Graph Coloring

dfs and similar, graphs

Ehab and the Big Finale

constructive algorithms, divide and conquer, graphs, implementation, interactive, trees

Gift

dsu, graphs, sortings, trees

Plan of Lectures

constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees

Infinite Card Game

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

Spanning Tree Queries

binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees

Team-Building

data structures, dfs and similar, dsu, graphs

AND-MEX Walk

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

Sum Balance

bitmasks, dfs and similar, dp, graphs

Useful Edges

graphs, shortest paths

Clues

combinatorics, graphs