Odd Sum Segments

constructive algorithms, math

Three Piles of Candies

brute force, constructive algorithms, math

Geometers Anonymous Club

data structures, geometry, math, sortings

OpenStreetMap

data structures, two pointers

Submarine in the Rybinsk Sea (hard edition)

combinatorics, math, number theory

Submarine in the Rybinsk Sea (easy edition)

combinatorics, math, number theory

Basketball Exercise

dp

Sport Mafia

binary search, brute force, math

Drinks Choosing

greedy, math

Another Meme Problem

dp

Crossword Expert

combinatorics, dp, number theory, probabilities, two pointers

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

1-2-K Game

games, math

From S To T

implementation, strings

Yet Another Crosses Problem

implementation

Remove a Progression

math

Scissors and Tape

*special problem, constructive algorithms, geometry

Magic Tree

*special problem, data structures, dp, trees

Amusement Park

*special problem, dp, math

Cubeword

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

Dynamic Diameter

*special problem, data structures, dfs and similar, divide and conquer, trees

Building Skyscrapers

*special problem

Tokitsukaze and Mahjong

brute force, implementation

Tokitsukaze and Enhancement

brute force

Tokitsukaze and Powers

number theory, probabilities

Tokitsukaze and Explosion

binary search, greedy

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Tokitsukaze and Duel

brute force, games, greedy

Tokitsukaze, CSL and Stone Game

games

Tokitsukaze and Discard Items

implementation, two pointers

Candies!

data structures, dp, implementation, math

Number Circle

greedy, math, sortings

Keanu Reeves

strings

Problem from Red Panda

combinatorics

Make Equal

dp

Array Beauty

dp

Count Pairs

math, matrices, number theory, two pointers

Add on a Tree: Revolution

constructive algorithms, dfs and similar, implementation, trees

Add on a Tree

trees

Gang Up

flows, graphs

Expected Square Beauty

dp, math, probabilities

Tree Painting

dfs and similar, dp, trees

Subarray Sorting

data structures, sortings

Vasya And Array

constructive algorithms, greedy, implementation

Letters Shop

binary search, implementation, strings

Stickers and Toys

math

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

Vus the Cossack and a Field

divide and conquer, implementation, math

Vus the Cossack and Numbers

constructive algorithms, greedy, math

Vus the Cossack and Strings

implementation, math

Vus the Cossack and a Contest

implementation

Playlist for Polycarp (hard version)

combinatorics, dp

Playlist for Polycarp (easy version)

bitmasks, combinatorics, dp

Two Pizzas

bitmasks, brute force

Polycarp and Snakes

brute force, implementation

Extra Element

implementation, math

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Exam in BerSU (easy version)

greedy, sortings

Email from Polycarp

implementation, strings

Ropewalkers

math

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Daleks' Invasion (medium)

dfs and similar, graphs, shortest paths, trees

Daleks' Invasion (easy)

graphs, trees

Parallel Universes (Hard)

math, matrices

Parallel Universes (Easy)

implementation

Heidi and the Turing Test (Hard)

Heidi and the Turing Test (Medium)

data structures

Heidi and the Turing Test (Easy)

implementation

The Doctor Meets Vader (Hard)

flows, shortest paths

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

The Doctor Meets Vader (Easy)

binary search, sortings

Heidi Learns Hashing (Hard)

fft, math, number theory

Heidi Learns Hashing (Medium)

brute force, number theory

Heidi Learns Hashing (Easy)

brute force, math, number theory

Subsequences (hard version)

dp, strings

Candy Box (hard version)

greedy, implementation, sortings

Topforces Strikes Back

brute force, math, sortings

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Candy Box (easy version)

greedy, sortings

Computer Game

binary search, math

Equalize Prices

math

Nearest Interesting Number

implementation

Maximum Sine

binary search, data structures, number theory

Product Oriented Recurrence

dp, math, matrices, number theory

Complete Mirror

constructive algorithms, dfs and similar, dp, hashing, implementation, trees

Beautiful Lyrics

data structures, greedy, strings

Plus from Picture

dfs and similar, implementation, strings

Filling Shapes

dp, math

A Story of One Country (Hard)

brute force, greedy, sortings

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Flag

brute force, combinatorics, dp, implementation

Split a Number

greedy, implementation, strings

Chunga-Changa

greedy, math

Nick and Array

greedy, implementation

Alex and a Rhombus

dp, implementation, math

Alesya and Discrete Math

divide and conquer, interactive

Fedor Runs for President

data structures, dp, trees

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Tolik and His Uncle

constructive algorithms