Music

implementation, math

Longest Increasing Subsequence

data structures, dp

Sign Posts

brute force, geometry, math

New Language

2-sat, greedy

Symmetric and Transitive

combinatorics, dp, math

Primes or Palindromes?

brute force, implementation, math, number theory

Mausoleum

dp

President and Roads

dfs and similar, graphs, hashing, shortest paths

One-Dimensional Battle Ships

binary search, data structures, greedy, sortings

Geometric Progression

binary search, data structures, dp

Berland National Library

implementation

Lineland Mail

greedy, implementation

Max and Min

geometry

Clique in the Divisibility Graph

dp, math, number theory

Restoring Map

bitmasks, constructive algorithms, trees

Restructuring Company

data structures, dsu

Logistical Questions

dfs and similar, divide and conquer, trees

Replicating Processes

constructive algorithms, greedy

Matching Names

dfs and similar, strings, trees

Gerald is into Art

constructive algorithms, implementation

Currency System in Geraldion

implementation, sortings

Gerald and Path

dp, sortings

Randomizer

combinatorics, geometry, probabilities

Gerald and Giant Chess

combinatorics, dp, math, number theory

Equivalent Strings

divide and conquer, hashing, sortings, strings

Gerald's Hexagon

brute force, geometry, math

A Simple Task

data structures, sortings, strings

Guess Your Way Out! II

data structures, implementation, sortings

Amr and Chemistry

brute force, graphs, greedy, math, shortest paths

Amr and The Large Array

implementation

Lala Land and Apple Trees

brute force, implementation, sortings

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

Vitaly and Cycle

combinatorics, dfs and similar, graphs, math

Arthur and Table

brute force, data structures, dp, greedy, math, sortings

Pasha and Tea

constructive algorithms, implementation, math, sortings

Ilya and Diplomas

greedy, implementation, math

Case of Fake Numbers

brute force, implementation

Case of the Zeros and Ones

greedy

Case of Computer Network

dfs and similar, graphs, trees

Case of a Top Secret

binary search, implementation, math

Case of Chocolate

data structures

Case of Fugitive

data structures, greedy, sortings

Case of Matryoshkas

implementation

Ohana Cleans Up

brute force, greedy, strings

Kyoya and Photobooks

brute force, math, strings

Kyoya and Train

dp, fft, graphs, math, probabilities

Nudist Beach

binary search, graphs, greedy

Love Triangles

dfs and similar, dsu, graphs

Kyoya and Permutation

binary search, combinatorics, constructive algorithms, greedy, implementation, math

Kyoya and Colored Balls

combinatorics, dp, math

Vanya and Brackets

brute force, dp, expression parsing, greedy, implementation, strings

Vanya and Triangles

brute force, combinatorics, data structures, geometry, math, sortings

Vanya and Scales

brute force, dp, greedy, math, meet-in-the-middle, number theory

Vanya and Books

implementation, math

Vanya and Table

implementation, math

GukiZ and GukiZiana

binary search, data structures, implementation

GukiZ and Binary Operations

combinatorics, implementation, math, matrices, number theory

GukiZ hates Boxes

binary search, greedy

ZgukistringZ

brute force, constructive algorithms, implementation, strings

GukiZ and Contest

brute force, implementation, sortings

Brackets in Implications

constructive algorithms, greedy, implementation, math

Regular Bridge

constructive algorithms, graphs, implementation

Divisibility by Eight

brute force, dp, math

Preparing Olympiad

bitmasks, brute force

Two Substrings

brute force, dp, greedy, implementation, strings

Degenerate Matrix

binary search, math

Happy Line

constructive algorithms, greedy, sortings

Yura and Developers

data structures, divide and conquer

Sasha Circle

geometry, math

Haar Features

greedy, implementation

The Game Of Parity

games

Looksery Party

constructive algorithms, dfs and similar, graphs, greedy

Face Detection

implementation, strings

Mike and Fun

brute force, dp, greedy, implementation

Mike and Fax

brute force, implementation, strings

Mike and Friends

data structures, string suffix structures, strings, trees

Mike and Fish

constructive algorithms, dfs and similar, graphs

Mike and Foam

bitmasks, combinatorics, dp, math, number theory

Mike and Feet

binary search, data structures, dp, dsu

Mike and Frog

brute force, greedy, implementation, math

Soldier and Traveling

flows, graphs, math

Soldier and Number Game

constructive algorithms, dp, math, number theory

Soldier and Cards

brute force, dfs and similar, games

Soldier and Badges

brute force, greedy, implementation, sortings

Soldier and Bananas

brute force, implementation, math

Paths and Trees

graphs, greedy, shortest paths

Queue

greedy, implementation, sortings

Woodcutters

dp, greedy

Equidistant String

greedy

Toy Cars

implementation

Sea and Islands

constructive algorithms, implementation

Set of Strings

implementation, strings

Listening to Music

constructive algorithms, data structures

Road Improvement

dp, trees

Remembering Strings

bitmasks, dp

Destroying Roads

constructive algorithms, graphs, shortest paths

Writing Code

dp

Quest

dp, greedy

Playing on Graph

graphs, shortest paths

Superhero's Job

dfs and similar, dp, hashing, math, number theory