Roland and Rose

brute force, geometry, math, sortings

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Kingdom of Islands

brute force, graphs, implementation

The Last Hole!

brute force, geometry

RC Kaboom Show

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

Substring Search

bitmasks, brute force, fft

Shortest path

brute force, geometry, math, shortest paths

Banners

brute force, data structures, dp

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

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

Игра в Девятку I

*special problem, brute force, dp

Race

brute force, implementation, two pointers

Graph Coloring (hard version)

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

Lucky Tickets

brute force, constructive algorithms

Game Bundles

brute force, constructive algorithms, dp, greedy, math

Random Elections

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

Word Folding

brute force

Chests and Keys

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

Dima and Kicks

brute force, dsu, graphs, implementation

Brand New Problem

bitmasks, brute force, dp

Colorful Tree Again

brute force, data structures, trees

Rhombus

brute force, data structures, dp

Savior

brute force, dsu, math

Qingshan and Daniel

brute force, data structures, greedy, implementation

Two Policemen

*special problem, binary search, brute force, math

Delivery Oligopoly

brute force, dp, graphs

Most Different Tree

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

Dasha and Photos

brute force, data structures, dp, implementation

Maxim and Calculator

brute force, dp, two pointers

Illumination

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

Dividing Kingdom

binary search, brute force, data structures

Azembler

brute force, implementation

Igor and Interesting Numbers

brute force, combinatorics, dp, math

Minibuses on Venus (hard version)

brute force, combinatorics, dp, math

Chainword

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

Candies for Children

brute force, math

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Suggested Friends

brute force, graphs

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

Field Should Not Be Empty

brute force, data structures, divide and conquer

Safe cracking

brute force, constructive algorithms

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Communication Towers

brute force, divide and conquer, dsu

Interactive Factorial Guessing

brute force, games, implementation, interactive

Scissors

brute force, strings

GCD is Greater

brute force, data structures, math, number theory

Ever-Hungry Krakozyabra

brute force, combinatorics, greedy, math

Polycarpus the Safecracker

brute force, dp

Last Man Standing

brute force, data structures, number theory

Nastya and CBS

brute force, data structures, hashing

Fetch the Treasure

brute force, data structures, graphs, shortest paths

Kay and Eternity

brute force, implementation, sortings

PE Lesson

brute force, dp

Crosses

brute force, implementation

Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

Large Refrigerator

brute force

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

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

Game of Stacks

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

Serval and Brain Power

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

Make Symmetrical

brute force

Tree Queries

brute force, dp, trees

Farmer John's Favorite Function

brute force, data structures, implementation, math

Graph And Numbers

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

Multiset of Strings

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

Carousel of Combinations

brute force, combinatorics, dp, math, number theory

Nene vs. Monsters (Hard Version)

brute force, greedy, implementation, math

Mushroom Strife

brute force, dfs and similar

Cube Problem

brute force, math, number theory

Elementary!

*special problem, brute force, dp, strings

Dating

brute force, dfs and similar, graphs, trees

Biathlon Track

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

Cute number

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

Cutting Rectangle

brute force, math, number theory

Project Manager

brute force, data structures, implementation

Armor and Weapons

brute force, dp, greedy, shortest paths

Collisions

brute force, implementation, math

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

Matrix Rank (Easy Version)

brute force, combinatorics, dp, math, matrices

AquaMoon and Permutations

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

Beautiful Set

brute force, number theory

Vanya and Balloons

binary search, brute force, dp, implementation

Tricolor Triangles

brute force, graphs, math, matrices

Mex Tree

brute force, dp, trees

Misha and Apples

brute force, data structures, dp, two pointers