Balanced Unshuffle (Medium)

brute force, constructive algorithms, trees

Сортировка слиянием

*special problem, *special problem, brute force

Shrink-Reverse

binary search, brute force, greedy, hashing, implementation, string suffix structures, strings

Roland and Rose

brute force, geometry, math, sortings

Kingdom of Islands

brute force, graphs, implementation

The Last Hole!

brute force, geometry

RC Kaboom Show

binary search, brute force, data structures, geometry, math

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Substring Search

bitmasks, brute force, fft

Shortest path

brute force, geometry, math, shortest paths

Banners

brute force, data structures, dp

Sources and Sinks

bitmasks, brute force, dfs and similar

Tower Defense

binary search, brute force, data structures

Boolean Computer

bitmasks, brute force, fft, math

Digits

brute force, implementation, math

Matching Reduction

brute force, constructive algorithms, dfs and similar, flows, graph matchings, graphs, interactive

Segment Covering

brute force, combinatorics, constructive algorithms, data structures, dp, trees

MEX Game 2 (Easy Version)

binary search, brute force, greedy

Игра в Девятку I

*special problem, brute force, dp

Graph Coloring (hard version)

brute force, combinatorics, divide and conquer, dp, fft, graphs

Lucky Tickets

brute force, constructive algorithms

Race

brute force, implementation, two pointers

Random Elections

bitmasks, brute force, divide and conquer, fft, math

Word Folding

brute force

Game Bundles

brute force, constructive algorithms, dp, greedy, math

Dima and Kicks

brute force, dsu, graphs, implementation

Chests and Keys

bitmasks, brute force, dfs and similar, dp, flows

Brand New Problem

bitmasks, brute force, dp

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Rhombus

brute force, data structures, dp

Savior

brute force, dsu, math

Colorful Tree Again

brute force, data structures, trees

Two Policemen

*special problem, binary search, brute force, math

Most Different Tree

brute force, constructive algorithms, dfs and similar, greedy, hashing

Delivery Oligopoly

brute force, dp, graphs

Dasha and Photos

brute force, data structures, dp, implementation

Maxim and Calculator

brute force, dp, two pointers

Qingshan and Daniel

brute force, data structures, greedy, implementation

Dividing Kingdom

binary search, brute force, data structures

Azembler

brute force, implementation

Igor and Interesting Numbers

brute force, combinatorics, dp, math

Chainword

brute force, data structures, dp, matrices, string suffix structures, strings

Minibuses on Venus (hard version)

brute force, combinatorics, dp, math

Candies for Children

brute force, math

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Suggested Friends

brute force, graphs

Illumination

binary search, bitmasks, brute force, combinatorics, dp, math, two pointers

Party Organization

brute force, math, probabilities

String Distance

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

Mad Joe

brute force

New Year and Binary Tree Paths

bitmasks, brute force, combinatorics, dp

Safe cracking

brute force, constructive algorithms

A Story of One Country (Easy)

brute force, divide and conquer, sortings

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

Field Should Not Be Empty

brute force, data structures, divide and conquer

Interactive Factorial Guessing

brute force, games, implementation, interactive

Scissors

brute force, strings

Ever-Hungry Krakozyabra

brute force, combinatorics, greedy, math

Polycarpus the Safecracker

brute force, dp

Communication Towers

brute force, divide and conquer, dsu

Nastya and CBS

brute force, data structures, hashing

Last Man Standing

brute force, data structures, number theory

Fetch the Treasure

brute force, data structures, graphs, shortest paths

Kay and Eternity

brute force, implementation, sortings

Crosses

brute force, implementation

Large Refrigerator

brute force

Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

PE Lesson

brute force, dp

Invertation in Tournament

brute force, divide and conquer, graphs, math

Typewriter

brute force, math

Awards For Contestants

brute force, data structures, dp

Sum of Matchings

brute force, combinatorics, constructive algorithms, dfs and similar, graph matchings, greedy, math

Rats

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

GCD is Greater

brute force, data structures, math, number theory

Limak and Shooting Points

brute force, geometry, math

Travelling Through the Snow Queen's Kingdom

bitmasks, brute force, divide and conquer, graphs

Writing a Song

brute force, dp, strings

Perun, Ult!

brute force, greedy, sortings

Make Symmetrical

brute force

Tree Queries

brute force, dp, trees

Graph And Numbers

bitmasks, brute force, combinatorics, dp, meet-in-the-middle

Serval and Brain Power

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

Game of Stacks

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

Multiset of Strings

bitmasks, brute force, dp, fft, flows, graphs, math, meet-in-the-middle, trees

Mushroom Strife

brute force, dfs and similar

Elementary!

*special problem, brute force, dp, strings

Cube Problem

brute force, math, number theory

Dating

brute force, dfs and similar, graphs, trees

Cute number

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

Biathlon Track

binary search, brute force, constructive algorithms, data structures, dp

Cutting Rectangle

brute force, math, number theory

Farmer John's Favorite Function

brute force, data structures, implementation, math

Project Manager

brute force, data structures, implementation

Collisions

brute force, implementation, math

Armor and Weapons

brute force, dp, greedy, shortest paths

Beautiful Set

brute force, number theory

Vanya and Balloons

binary search, brute force, dp, implementation

Matrix Rank (Easy Version)

brute force, combinatorics, dp, math, matrices

Tricolor Triangles

brute force, graphs, math, matrices

AquaMoon and Permutations

2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs