Four Vertices

constructive algorithms, data structures, graphs, greedy, implementation, shortest paths

Down Below

binary search, dfs and similar, graphs, greedy, meet-in-the-middle, shortest paths

Jumping Around

binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths

Air Conditioners

data structures, dp, implementation, shortest paths, sortings, two pointers

Great Graphs

constructive algorithms, graphs, greedy, shortest paths, sortings

Omkar and Forest

combinatorics, graphs, math, shortest paths

Lost Array

graphs, greedy, interactive, shortest paths

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

constructive algorithms, graphs, shortest paths

To Go Or Not To Go?

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

Explorer Space

dp, graphs, shortest paths

Triangular Paths

constructive algorithms, graphs, math, shortest paths, sortings

Cakewalk

*special problem, greedy, implementation, shortest paths

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

BFS Trees

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

Ones

dp, greedy, shortest paths

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Eastern Exhibition

binary search, geometry, shortest paths, sortings

Useful Edges

graphs, shortest paths

Playlist

data structures, dsu, implementation, shortest paths

Minimum Path

graphs, shortest paths

Moving to the Capital

dfs and similar, dp, graphs, shortest paths

Capitalism

constructive algorithms, dfs and similar, graphs, shortest paths

Graph Transpositions

dfs and similar, graphs, greedy, shortest paths

Minimal Height Tree

graphs, greedy, shortest paths, trees

Reducing Delivery Cost

brute force, graphs, shortest paths

Returning Home

graphs, shortest paths, sortings

Hexagons

brute force, constructive algorithms, greedy, implementation, math, shortest paths

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

Egor in the Republic of Dagestan

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Omkar and Pies

bitmasks, dfs and similar, dp, math, shortest paths

Viruses

*special problem, dp, shortest paths, string suffix structures

The Hidden Pair (Hard Version)

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

The Hidden Pair (Easy Version)

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

Solve The Maze

constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths

Polygon

dp, graphs, implementation, shortest paths

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Nastya and Unexpected Guest

dfs and similar, dp, graphs, shortest paths

Ehab's REAL Number Theory Problem

brute force, dfs and similar, graphs, number theory, shortest paths

Treeland and Viruses

data structures, dfs and similar, dp, shortest paths, trees

Navigation System

dfs and similar, graphs, shortest paths

Cow and Exercise

flows, graphs, shortest paths

Cow and Fields

binary search, data structures, dfs and similar, graphs, greedy, shortest paths, sortings

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Super Jaber

dfs and similar, graphs, implementation, shortest paths

Christmas Trees

graphs, greedy, shortest paths

Nearest Opposite Parity

dfs and similar, graphs, shortest paths

Cheap Robot

binary search, dsu, graphs, shortest paths, trees

Show Must Go On

binary search, brute force, greedy, shortest paths

By Elevator or Stairs?

dp, shortest paths

Hyakugoku and Ladders

dp, probabilities, shortest paths

Shichikuji and Power Grid

dsu, graphs, greedy, shortest paths, trees

Arson In Berland Forest

binary search, graphs, graphs, shortest paths

Alpha planetary system

constructive algorithms, graphs, shortest paths

Koala and Notebook

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

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

You Are Given a Decimal String...

brute force, dp, shortest paths

Knightmare (hard)

graphs, interactive, shortest paths

Knightmare (easy)

graphs, interactive, shortest paths

Culture Code

binary search, combinatorics, data structures, dp, shortest paths, sortings

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Daleks' Invasion (medium)

dfs and similar, graphs, shortest paths, trees

The Doctor Meets Vader (Hard)

flows, shortest paths

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Cover it!

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

Indecisive Taxi Fee

data structures, graphs, shortest paths

Double Tree

data structures, divide and conquer, shortest paths, trees

Lunar New Year and a Wander

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

Kilani and the Game

dfs and similar, graphs, implementation, shortest paths

Maximum Distance

dsu, graphs, shortest paths, sortings

Edge Deletion

graphs, greedy, shortest paths

Find a Number

dp, graphs, number theory, shortest paths

Multihedgehog

dfs and similar, graphs, shortest paths

Three Pieces

dfs and similar, dp, shortest paths

Labyrinth

graphs, shortest paths

The Shortest Statement

graphs, shortest paths, trees

Make It One

bitmasks, combinatorics, dp, math, number theory, shortest paths

Valid BFS?

dfs and similar, graphs, shortest paths, trees

Berland and the Shortest Paths

brute force, dfs and similar, graphs, shortest paths

Sonya and Ice Cream

binary search, data structures, dp, greedy, shortest paths, trees

Oppa Funcan Style Remastered

graphs, math, number theory, shortest paths

Fair

graphs, greedy, number theory, shortest paths

Elevator

dp, graphs, shortest paths

Fight Against Traffic

dfs and similar, graphs, shortest paths

Buy a Ticket

data structures, graphs, shortest paths

Iqea

data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees

A Game With Numbers

games, graphs, shortest paths

Jamie and Interesting Graph

constructive algorithms, graphs, shortest paths

Logical Expression

bitmasks, dp, shortest paths

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

Exploration plan

binary search, flows, graph matchings, shortest paths

Dynamic Shortest Path

graphs, shortest paths

Dirty Arkady's Kitchen

data structures, dp, graphs, shortest paths

Okabe and City

dfs and similar, graphs, shortest paths

An unavoidable detour for home

combinatorics, dp, graphs, shortest paths

Police Stations

constructive algorithms, dfs and similar, dp, graphs, shortest paths, trees