Building Forest

data structures, dsu, graphs

After Training

data structures, implementation, math

Two Segments

data structures

Thwarting Demonstrations

binary search, data structures, trees

Fools and Roads

data structures, dfs and similar, trees

Counter Attack

data structures, dsu, graphs, hashing, sortings

Heaven Tour

data structures, greedy

BRT Contract

data structures

Soap Time! - 2

binary search, data structures

Optimal Sum

data structures, greedy

Encrypting Messages

data structures

Archaeology

data structures, dfs and similar, trees

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Range Increments

data structures, greedy

Camping Groups

data structures, sortings

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

Beard Graph

data structures, dsu, trees

e-Government

data structures, dfs and similar, dp, strings, trees

Buses and People

binary search, data structures, sortings

Zebra Tower

*special problem, data structures, greedy, sortings

String Manipulation 1.0

*special problem, binary search, brute force, data structures, strings

Cd and pwd commands

*special problem, data structures, implementation

Suspects

constructive algorithms, data structures, implementation

Freezing with Style

binary search, data structures, divide and conquer, trees

Smart Cheater

data structures, math, probabilities

Lucky Queries

data structures

Lucky Pair

combinatorics, data structures, implementation

Competition

data structures, greedy

Missile Silos

data structures, dfs and similar, graphs, shortest paths

New Year Snowmen

binary search, data structures, greedy

Mushroom Gnomes - 2

binary search, data structures, probabilities, sortings

Last Chance

data structures, implementation, strings

Lucky Array

data structures

Tree or not Tree

data structures, divide and conquer, implementation, trees

Linear Kingdom Races

data structures, dp

Petr#

brute force, data structures, hashing, strings

Petya and Divisors

binary search, data structures, number theory

Time to Raid Cowavans

brute force, data structures, sortings

Buses

binary search, data structures, dp

Name the album

*special problem, data structures, implementation

Igloo Skyscraper

data structures, geometry

Queue

binary search, data structures

Chip Play

brute force, data structures, implementation

Powerful array

data structures, implementation, math, two pointers

Sum of Medians

binary search, brute force, data structures, implementation

Embassy Queue

data structures, greedy

General Mobilization

data structures, dfs and similar, sortings

Beaver

data structures, dp, greedy, hashing, strings, two pointers

Tourist

binary search, data structures, dp

Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

Hanger

data structures

Professor's task

data structures, geometry

Lucky Tickets

binary search, data structures, sortings, two pointers

Subsegments

data structures, implementation

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

Optical Experiment

binary search, data structures, dp

Petya and Post

data structures, dp

Petya and File System

data structures, implementation

Enemy is weak

data structures, trees

Domino Principle

binary search, data structures, sortings

Corporation Mail

data structures, expression parsing, implementation

Circular RMQ

data structures

Cannon

data structures, geometry, sortings

Comb

data structures, dp

Parking Lot

data structures, implementation

Dancing Lessons

data structures

Shooting Gallery

data structures, implementation

Queue

data structures

Old Berland Language

data structures, greedy, trees

Parade

data structures, sortings

Tricky and Clever Password

binary search, constructive algorithms, data structures, greedy, hashing, strings

Mail Stamps

data structures, dfs and similar, graphs, implementation

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Points

data structures

Stripe

data structures, implementation

Map

data structures, implementation, sortings

Holes

data structures, dsu

Ball

data structures, sortings

Exposition

binary search, data structures, dsu, trees, two pointers

Bindian Signalizing

data structures

Longest Regular Bracket Sequence

constructive algorithms, data structures, dp, greedy, sortings, strings

Registration System

data structures, hashing, implementation