Pairs

dfs and similar, dp, dsu, graphs, implementation, trees

Delete The Edges

brute force, constructive algorithms, dfs and similar, graphs, implementation

Array Sorting

*special problem, implementation

Sagheer and Kindergarten

dfs and similar, graphs, implementation, trees

Four Vertices

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

Tractor College

implementation, math, number theory, ternary search

Table

*special problem, greedy, implementation, math

Anagram Paths

dp, implementation, trees

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

Дефрагментация памяти

constructive algorithms, greedy, implementation

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Kingdom of Islands

brute force, graphs, implementation

Showing Off

flows, graph matchings, greedy, implementation

Rhyme

*special problem, implementation

Shooting Gallery

data structures, implementation

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Digits

brute force, implementation, math

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

You Are Given Some Letters...

binary search, implementation, math

Race

brute force, implementation, two pointers

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Air Reform

data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees

Dima and Kicks

brute force, dsu, graphs, implementation

Playing Around the Table

constructive algorithms, greedy, implementation

Game with Tokens

data structures, games, implementation

Qingshan and Daniel

brute force, data structures, greedy, implementation

Red and Black Tree

dp, implementation, math

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings

Dasha and Photos

brute force, data structures, dp, implementation

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Once in a casino

constructive algorithms, greedy, implementation, math

Cartoons

*special problem, implementation, sortings

Get Ready for the Battle

constructive algorithms, implementation

Azembler

brute force, implementation

Sherlock's bet to Moriarty

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees

Game with Points

dp, graphs, implementation, shortest paths

Decoding of Integer Sequences

*special problem, data structures, implementation

One Node is Gone

constructive algorithms, implementation, trees

Geometrical problem

implementation

Touchy-Feely Palindromes

*special problem, implementation

The Cells on the Paper

binary search, implementation, sortings

Strange Radiation

binary search, implementation, math

String Distance

binary search, brute force, data structures, hashing, implementation, strings

Tasty Cookie

binary search, constructive algorithms, greedy, implementation

LCM

*special problem, implementation, math

Tricky Interactor

constructive algorithms, implementation, interactive

Nene vs. Monsters (Hard Version)

brute force, implementation, math

Game

games, implementation

Interactive Factorial Guessing

brute force, games, implementation, interactive

New Year and Cleaning

binary search, implementation

Goofy Numbers

*special problem, implementation

Sweets

*special problem, data structures, implementation

Black Widow

dp, graphs, implementation, math

New Year and Finding Roots

constructive algorithms, implementation, interactive, trees

Plane Tiling

geometry, implementation, math

Cyclic Cipher

chinese remainder theorem, data structures, implementation, number theory, two pointers

Vasya the Architect

implementation

Piet

implementation

Rain of Fire

binary search, data structures, dfs and similar, dsu, graphs, implementation

Sweets for Everyone!

binary search, greedy, implementation

Chips Puzzle

constructive algorithms, implementation, math

Information Reform

dp, implementation, trees

Kay and Eternity

brute force, implementation, sortings

Crosses

brute force, implementation

Dormitory

dp, implementation

Double Elimination

dp, implementation

Two Paths

constructive algorithms, dsu, graphs, implementation

HQ9+

*special problem, implementation

Tests Renumeration

greedy, implementation

Rats

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

Raging Thunder

data structures, divide and conquer, implementation

Madoka and The First Session

constructive algorithms, flows, graph matchings, graphs, implementation

Farmer John's Favorite Function

brute force, data structures, implementation, math

Game of Stacks

brute force, dfs and similar, graphs, implementation, trees

Mirror Box

geometry, implementation

Widget Library

dp, expression parsing, graphs, implementation

Serval and Brain Power

bitmasks, brute force, dp, greedy, implementation, strings

Number of Components

dsu, implementation

Too Many Constraints

2-sat, constructive algorithms, graphs, implementation

MEX counting

combinatorics, dp, implementation

A+B

*special problem, implementation

Gnikool Ssalg

*special problem, implementation, strings

Printer

binary search, data structures, implementation, sortings

Colorado Potato Beetle

dfs and similar, implementation

Colour Vision

*special problem, implementation

Defragmentation

implementation

Sereja and Tree

graphs, implementation

Strange Instructions

data structures, greedy, implementation

Friendly Numbers

*special problem, implementation

Are You Safe?

*special problem, implementation

Colored Cubes

constructive algorithms, implementation, matrices

Not Splitting

geometry, graphs, greedy, implementation, shortest paths

Equal Reversal

constructive algorithms, graphs, implementation, math

Cute number

binary search, brute force, data structures, dsu, implementation, math

Vus the Cossack and a Field

divide and conquer, implementation, math

Game

implementation

Poisonous Swamp

*special problem, *special problem, implementation, implementation

Project Manager

brute force, data structures, implementation