Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Iqea

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

Dynamic Shortest Path

graphs, shortest paths

Oppa Funcan Style Remastered

graphs, math, number theory, shortest paths

Dirty Arkady's Kitchen

data structures, dp, graphs, shortest paths

Show Must Go On

binary search, brute force, greedy, shortest paths

Princess and Her Shadow

constructive algorithms, shortest paths

Four Vertices

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

Cow and Exercise

flows, graphs, shortest paths

Alpha planetary system

constructive algorithms, graphs, shortest paths

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Knightmare (hard)

graphs, interactive, shortest paths

Chess

math, shortest paths

Reindeer Games

binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths

The Game of the Century

constructive algorithms, graphs, shortest paths

Appleman and a Game

binary search, shortest paths, strings

Down Below

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

Treeland and Viruses

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

Indecisive Taxi Fee

data structures, graphs, shortest paths

The Classic Problem

data structures, graphs, shortest paths

Knightmare (easy)

graphs, interactive, shortest paths

Viruses

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

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Snowy Mountain

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

Ones

dp, greedy, shortest paths

Omkar and Pies

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

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Infinite Chess

implementation, shortest paths

Anti-Tetris

constructive algorithms, graphs, shortest paths

Armor and Weapons

brute force, dp, greedy, shortest paths

Levko and Game

graphs, greedy, shortest paths

Serious Business

data structures, divide and conquer, dp, implementation, shortest paths

Password

bitmasks, dp, shortest paths

Team Rocket Rises Again

data structures, graphs, shortest paths

The Doctor Meets Vader (Hard)

flows, shortest paths

Shortest path

brute force, geometry, math, shortest paths

Double Tree

data structures, divide and conquer, shortest paths, trees

Jumping Around

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

Not Splitting

geometry, graphs, greedy, implementation, shortest paths

Perishable Roads

dp, graphs, shortest paths

Approximate Diameter

binary search, divide and conquer, graphs, shortest paths

Christmas Chocolates

dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees

Distance Tree (hard version)

binary search, dfs and similar, shortest paths, trees

Capitalism

constructive algorithms, dfs and similar, graphs, shortest paths

The Hidden Pair (Hard Version)

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

Intergalaxy Trips

probabilities, shortest paths

Doe Graphs

constructive algorithms, divide and conquer, dp, graphs, shortest paths

A Game With Numbers

games, graphs, shortest paths

Monsters and Diamonds

dfs and similar, graphs, shortest paths

Meeting Her

dp, graphs, shortest paths

Circling Round Treasures

bitmasks, shortest paths

Trial for Chief

graphs, greedy, shortest paths

An unavoidable detour for home

combinatorics, dp, graphs, shortest paths

Labyrinth Adventures

data structures, dp, matrices, shortest paths

Robot Control

dp, graphs, shortest paths

Opening Portals

dsu, graphs, shortest paths

Playing on Graph

graphs, shortest paths

Flights

graphs, shortest paths

Koala and Notebook

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

Super Jaber

dfs and similar, graphs, implementation, shortest paths

BFS Trees

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

Ehab's REAL Number Theory Problem

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

Fetch the Treasure

brute force, data structures, graphs, shortest paths

Italian Data Centers

graphs, shortest paths

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

constructive algorithms, graphs, shortest paths

Cheap Robot

binary search, dsu, graphs, shortest paths, trees

President's Path

dp, graphs, shortest paths

Egor in the Republic of Dagestan

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

Make It One

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

Ship's Shortest Path

geometry, shortest paths

Winning Strategy

binary search, graphs, math, shortest paths

Track

graphs, greedy, shortest paths

BerDonalds

graphs, math, shortest paths

Logical Expression

bitmasks, dp, shortest paths

Quarrel

graphs, shortest paths

Elevator

dp, graphs, shortest paths

PolandBall and White-Red graph

constructive algorithms, graphs, shortest paths

Sonya and Ice Cream

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

Distance Tree (easy version)

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

Connectivity Addicts

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

The Hidden Pair (Easy Version)

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

Long Way Home

data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths

Cactus Wall

constructive algorithms, dfs and similar, graphs, shortest paths

The Beach

constructive algorithms, dfs and similar, graphs, shortest paths

Useful Edges

graphs, shortest paths

Graph Transpositions

dfs and similar, graphs, greedy, shortest paths

Arthur and Walls

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

Nastya and Unexpected Guest

dfs and similar, dp, graphs, shortest paths

The Shortest Statement

graphs, shortest paths, trees

Minimum Path

graphs, shortest paths

Rats

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

Evacuation

flows, graphs, shortest paths

Petya and Pipes

flows, graphs, shortest paths

Take-off Ramps

graphs, shortest paths

Tokens on Graph

constructive algorithms, dfs and similar, graphs, shortest paths

Hyakugoku and Ladders

dp, probabilities, shortest paths

Culture Code

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

Vanya and Treasure

data structures, dp, graphs, shortest paths

Lost Array

graphs, greedy, interactive, shortest paths