Cutting Rectangle

brute force, math, number theory

Cute number

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

Biathlon Track

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

Dating

brute force, dfs and similar, graphs, trees

Elementary!

*special problem, brute force, dp, strings

Cube Problem

brute force, math, number theory

Mushroom Strife

brute force, dfs and similar

Multiset of Strings

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

Game of Stacks

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

Serval and Brain Power

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

Graph And Numbers

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

Tree Queries

brute force, dp, trees

Make Symmetrical

brute force

Perun, Ult!

brute force, greedy, sortings

Writing a Song

brute force, dp, strings

Limak and Shooting Points

brute force, geometry, math

Travelling Through the Snow Queen's Kingdom

bitmasks, brute force, divide and conquer, graphs

GCD is Greater

brute force, data structures, math, number theory

Rats

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

Sum of Matchings

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

Awards For Contestants

brute force, data structures, dp

Typewriter

brute force, math

Invertation in Tournament

brute force, divide and conquer, graphs, math

Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

PE Lesson

brute force, dp

Crosses

brute force, implementation

Large Refrigerator

brute force

Kay and Eternity

brute force, implementation, sortings

Fetch the Treasure

brute force, data structures, graphs, shortest paths

Last Man Standing

brute force, data structures, number theory

Nastya and CBS

brute force, data structures, hashing

Communication Towers

brute force, divide and conquer, dsu

Polycarpus the Safecracker

brute force, dp

Ever-Hungry Krakozyabra

brute force, combinatorics, greedy, math

Interactive Factorial Guessing

brute force, games, implementation, interactive

Scissors

brute force, strings

Field Should Not Be Empty

brute force, data structures, divide and conquer

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Safe cracking

brute force, constructive algorithms

New Year and Binary Tree Paths

bitmasks, brute force, combinatorics, dp

String Distance

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

Mad Joe

brute force

Party Organization

brute force, math, probabilities

Illumination

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

Suggested Friends

brute force, graphs

Candies for Children

brute force, math

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Minibuses on Venus (hard version)

brute force, combinatorics, dp, math

Chainword

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

Igor and Interesting Numbers

brute force, combinatorics, dp, math

Azembler

brute force, implementation

Dividing Kingdom

binary search, brute force, data structures

Qingshan and Daniel

brute force, data structures, greedy, implementation

Maxim and Calculator

brute force, dp, two pointers

Dasha and Photos

brute force, data structures, dp, implementation

Delivery Oligopoly

brute force, dp, graphs

Most Different Tree

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

Two Policemen

*special problem, binary search, brute force, math

Colorful Tree Again

brute force, data structures, trees

Savior

brute force, dsu, math

Rhombus

brute force, data structures, dp

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Brand New Problem

bitmasks, brute force, dp

Chests and Keys

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

Dima and Kicks

brute force, dsu, graphs, implementation

Game Bundles

brute force, constructive algorithms, dp, greedy, math

Random Elections

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

Word Folding

brute force

Race

brute force, implementation, two pointers

Lucky Tickets

brute force, constructive algorithms

Graph Coloring (hard version)

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

Игра в Девятку I

*special problem, brute force, dp

Segment Covering

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

MEX Game 2 (Easy Version)

binary search, brute force, greedy

Matching Reduction

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

Boolean Computer

bitmasks, brute force, fft, math

Digits

brute force, implementation, math

Tower Defense

binary search, brute force, data structures

Sources and Sinks

bitmasks, brute force, dfs and similar

Banners

brute force, data structures, dp

Shortest path

brute force, geometry, math, shortest paths

Substring Search

bitmasks, brute force, fft

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

RC Kaboom Show

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

Kingdom of Islands

brute force, graphs, implementation

The Last Hole!

brute force, geometry

Roland and Rose

brute force, geometry, math, sortings

Shrink-Reverse

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

Сортировка слиянием

*special problem, *special problem, brute force

Balanced Unshuffle (Medium)

brute force, constructive algorithms, trees

Delete The Edges

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

Tree Calendar

brute force, constructive algorithms, data structures, dfs and similar, sortings, trees

Cubeword

*special problem, brute force, dp, meet-in-the-middle

Fibonacci Number

brute force, math, matrices

Sweepstake

*special problem, brute force, constructive algorithms, implementation, math

Min-Fund Prison (Medium)

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

Triangle Platinum?

brute force, combinatorics, implementation, interactive, math, probabilities

Goblins And Gnomes

brute force, dp, flows, graph matchings

Permutation Counting

brute force, combinatorics, dp, fft, math