Even Simple Path

constructive algorithms, graphs, shortest paths

Shortest GCD Paths

dp, graphs, math, number theory, shortest paths, shortest paths

Shortest Paths

*special problem, shortest paths

Boxed Like a Fish

dfs and similar, dp, games, shortest paths, trees

Product Queries

dp, math, number theory, shortest paths

Create or Duplicate

bitmasks, graphs, number theory, shortest paths

Maximum Distance To Port

graphs, shortest paths

Palindrome Flipping

brute force, constructive algorithms, graphs, implementation, shortest paths, strings

Cycle Closing

constructive algorithms, graphs, implementation, shortest paths, trees

Rada and the Chamomile Valley

dfs and similar, graphs, shortest paths

Strict Triangle

graphs, greedy, shortest paths

Traffic Lights

brute force, data structures, divide and conquer, dp, graphs, greedy, shortest paths

Volcanic Eruptions

dfs and similar, dp, greedy, shortest paths, trees

Omg Graph

brute force, dsu, graphs, greedy, shortest paths, sortings

Variables and Operations

graphs, greedy, shortest paths

Penguin Steps

binary search, dfs and similar, flows, graphs, shortest paths

D/D/D

dfs and similar, graphs, greedy, shortest paths

Spruce Dispute

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

Gleb and Boating

brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths

Pinball

graphs, shortest paths

A Very Long Hike

shortest paths

Porto Vs. Benfica

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

Graph and Graph

data structures, graphs, greedy, shortest paths

Another Exercise on Graphs (hard version)

binary search, dfs and similar, dp, dsu, graphs, shortest paths, sortings

Another Exercise on Graphs (Easy Version)

binary search, brute force, dp, dsu, graphs, shortest paths, sortings

Affectionate Arrays (Hard Version)

data structures, dp, graphs, greedy, math, shortest paths, two pointers

Incompetent Delivery Guy

graphs, shortest paths

X Aura

graphs, math, shortest paths

Nim

bitmasks, brute force, combinatorics, dp, games, greedy, implementation, shortest paths

Drunken Maze

brute force, dfs and similar, graphs, shortest paths

Skipping

binary search, dp, graphs, shortest paths

Rendez-vous de Marian et Robin

dfs and similar, graphs, shortest paths

Colored Portals

binary search, brute force, data structures, graphs, greedy, implementation, shortest paths

Call During the Journey

binary search, brute force, graphs, greedy, shortest paths

Determine Winning Islands in Race

data structures, dp, graphs, greedy, shortest paths

Paint the Tree

brute force, dfs and similar, dp, greedy, shortest paths, trees

Long Way to be Non-decreasing

binary search, dfs and similar, graphs, implementation, shortest paths, two pointers

The Most Reckless Defense

bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths

Arrow Path

brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths

Rudolf and Subway

constructive algorithms, dfs and similar, graphs, shortest paths

Pokémon Arena

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

Turtle Mission: Robot and the Earthquake

dfs and similar, dp, graphs, shortest paths

Moving Platforms

graphs, math, number theory, shortest paths

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

Smooth Sailing (Easy Version)

binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Unusual Entertainment

data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Vova Escapes the Matrix

brute force, dfs and similar, divide and conquer, shortest paths

Time Travel

binary search, graphs, shortest paths

Minimum Maximum Distance

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

Jellyfish and Math

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

Mad City

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

Another MEX Problem

bitmasks, brute force, dp, shortest paths

2D Traveling

geometry, math, shortest paths, sortings

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Teleportation in Byteland

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

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Tenzing and Tree

dfs and similar, greedy, shortest paths, sortings, trees

Round Dance

dfs and similar, dsu, graphs, shortest paths

Sum Graph

brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees

Approximate Diameter

binary search, divide and conquer, graphs, shortest paths

The way home

binary search, data structures, dp, graphs, greedy, shortest paths, sortings

Tokens on Graph

constructive algorithms, dfs and similar, graphs, shortest paths

Timofey and Black-White Tree

brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees

The Game of the Century

constructive algorithms, graphs, shortest paths

Italian Data Centers

graphs, shortest paths

Friendly Spiders

dfs and similar, graphs, math, number theory, shortest paths

Infinite Chess

implementation, shortest paths

Thermostat

greedy, math, shortest paths

The Beach

constructive algorithms, dfs and similar, graphs, shortest paths

Cactus Wall

constructive algorithms, dfs and similar, graphs, shortest paths

Kirill and Company

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

Connectivity Addicts

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

Ela and the Wiring Wizard

brute force, dp, graphs, greedy, implementation, shortest paths

Moving Both Hands

dp, graphs, shortest paths

Long Way Home

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

Empty Graph

binary search, constructive algorithms, data structures, greedy, shortest paths

Permutation Graph

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

Zero Path

brute force, data structures, dp, graphs, greedy, shortest paths

Keshi in Search of AmShZ

graphs, greedy, shortest paths

Lena and Matrix

data structures, dp, geometry, shortest paths

Labyrinth Adventures

data structures, dp, matrices, shortest paths

Required Length

brute force, dfs and similar, dp, hashing, shortest paths

Job Lookup

constructive algorithms, dp, shortest paths, trees

Antennas

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

Getting Zero

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

Snowy Mountain

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

Nearest Excluded Points

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

Counting Shortcuts

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

Serious Business

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

Distance Tree (hard version)

binary search, dfs and similar, shortest paths, trees

Distance Tree (easy version)

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

Not Splitting

geometry, graphs, greedy, implementation, shortest paths

Not Escaping

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

Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Christmas Chocolates

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

Reindeer Games

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

Armor and Weapons

brute force, dp, greedy, shortest paths

Escape The Maze (hard version)

dfs and similar, dp, greedy, shortest paths, trees