Queue at the School

constructive algorithms, graph matchings, implementation, shortest paths

Two Buttons

dfs and similar, graphs, greedy, implementation, math, shortest paths

Dijkstra?

graphs, shortest paths

Polygon

dp, graphs, implementation, shortest paths

Shortest path of the king

greedy, shortest paths

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

Thermostat

greedy, math, shortest paths

Getting Zero

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

Solve The Maze

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

Eastern Exhibition

binary search, geometry, shortest paths, sortings

2D Traveling

geometry, math, shortest paths, sortings

Arrow Path

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

Lunar New Year and a Wander

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

Air Conditioners

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

Valid BFS?

dfs and similar, graphs, shortest paths, trees

Great Graphs

constructive algorithms, graphs, greedy, shortest paths, sortings

Greg and Graph

dp, graphs, shortest paths

Minimal Height Tree

graphs, greedy, shortest paths, trees

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

The Two Routes

graphs, shortest paths

Cover it!

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

Zero Path

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

Igor In the Museum

dfs and similar, graphs, shortest paths

Round Dance

dfs and similar, dsu, graphs, shortest paths

Rook, Bishop and King

graphs, math, shortest paths

Required Length

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

By Elevator or Stairs?

dp, shortest paths

Xenia and Weights

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

Jzzhu and Cities

graphs, greedy, shortest paths

King's Path

dfs and similar, graphs, hashing, shortest paths

Christmas Trees

graphs, greedy, shortest paths

Explorer Space

dp, graphs, shortest paths

Labyrinth

graphs, shortest paths

Escape The Maze (easy version)

dfs and similar, greedy, shortest paths, trees, two pointers

Shichikuji and Power Grid

dsu, graphs, greedy, shortest paths, trees

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Fair

graphs, greedy, number theory, shortest paths

Mad City

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

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

Fight Against Traffic

dfs and similar, graphs, shortest paths

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

Eternal Victory

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

Fire Again

brute force, dfs and similar, shortest paths

Biridian Forest

dfs and similar, shortest paths

Cow and Fields

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

Minimum Maximum Distance

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

Nearest Opposite Parity

dfs and similar, graphs, shortest paths

Roads in Berland

graphs, shortest paths

Navigation System

dfs and similar, graphs, shortest paths

Friendly Spiders

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

Mike and Shortcuts

dfs and similar, graphs, greedy, shortest paths

Legacy

data structures, graphs, shortest paths

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Permutation Graph

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

Police Stations

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

Buy a Ticket

data structures, graphs, shortest paths

Design Tutorial: Inverse the Problem

dfs and similar, dsu, shortest paths, trees

Jamie and Interesting Graph

constructive algorithms, graphs, shortest paths

Edge Deletion

graphs, greedy, shortest paths

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Nearest Excluded Points

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

Frog Traveler

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

Array Stabilization (AND version)

brute force, graphs, math, number theory, shortest paths

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Hierarchy

dfs and similar, dsu, greedy, shortest paths

Planets

binary search, data structures, graphs, shortest paths

Moving to the Capital

dfs and similar, dp, graphs, shortest paths

Paths and Trees

graphs, greedy, shortest paths

You Are Given a Decimal String...

brute force, dp, shortest paths

Igor and his way to work

dfs and similar, graphs, implementation, shortest paths

Two Paths

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

Empty Graph

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

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Reducing Delivery Cost

brute force, graphs, shortest paths

Jumping on Walls

shortest paths

String Problem

shortest paths

Hexagons

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

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Lena and Matrix

data structures, dp, geometry, shortest paths

Kilani and the Game

dfs and similar, graphs, implementation, shortest paths

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

Amr and Chemistry

brute force, graphs, greedy, math, shortest paths

Maximum Distance

dsu, graphs, shortest paths, sortings

Destroying Roads

constructive algorithms, graphs, shortest paths

Missile Silos

data structures, dfs and similar, graphs, shortest paths

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Playlist

data structures, dsu, implementation, shortest paths

Escape The Maze (hard version)

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

Phillip and Trains

dfs and similar, graphs, shortest paths

To Go Or Not To Go?

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

Minimum Path

graphs, shortest paths

Travelling Salesman Problem

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

Timofey and Black-White Tree

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

Shortest Path

graphs, shortest paths

Triangular Paths

constructive algorithms, graphs, math, shortest paths, sortings

Unusual Entertainment

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

Rudolf and Subway

constructive algorithms, dfs and similar, graphs, shortest paths

Chamber of Secrets

dfs and similar, shortest paths

Innokenty and a Football League

2-sat, graphs, greedy, implementation, shortest paths, strings