Beautiful fountains rows

data structures

Mike and code of a permutation

constructive algorithms, data structures, graphs, sortings

Sequence Recovery

bitmasks, data structures, greedy

Leha and security system

data structures

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Julia the snail

data structures, divide and conquer, dp

Mages and Monsters

data structures, geometry

New task

data structures

ALT

data structures, flows, graphs, trees

Rap God

data structures, dfs and similar, hashing, strings, trees

Andryusha and Nervous Barriers

data structures, dp

Sherlock's bet to Moriarty

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

Blog Post Rating

data structures, sortings

The Winds of Winter

binary search, data structures

Souvenirs

data structures

Timofey and our friends animals

data structures, divide and conquer, dsu

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Team Rocket Rises Again

data structures, graphs, shortest paths

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths

data structures, dfs and similar, trees

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Expression Queries

data structures

Cyclic Cipher

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

Array Covering

data structures

Slalom

data structures, dp, sortings

Animals and Puzzle

binary search, data structures

Iron Man

data structures, geometry, trees

T-Shirts

data structures

Huffman Coding on Segment

data structures, greedy

...Wait for it...

data structures, dsu, trees

Bear and Bad Powers of 42

data structures

Organizing a Race

data structures, greedy

Roads in Yusland

data structures, dp, greedy

Ultimate Weirdness of an Array

data structures, number theory

Forensic Examination

data structures, string suffix structures

Clockwork Bomb

data structures, dfs and similar, dsu, greedy, trees

Choosing Ads

data structures

Bear and Chemistry

data structures, dfs and similar, graphs, trees

Fibonacci-ish II

data structures, implementation

Yash And Trees

bitmasks, data structures, dfs and similar, math, number theory

Raffles

data structures, dp, greedy, math

Frog Fights

data structures, greedy

Xors on Segments

data structures, strings, trees

Pastoral Oddities

data structures, divide and conquer, dsu, math, trees

A Museum Robbery

data structures, dp

Duff is Mad

data structures, strings

Duff as a Queen

data structures

Painting Edges

binary search, data structures

Robots protection

data structures

Fibonotci

data structures, math, matrices

Bear and Bowling

data structures, greedy

Bear and Cavalry

data structures, divide and conquer, dp

Campus

binary search, data structures, dsu, trees

Longest Increasing Subsequence

data structures, dp

Yura and Developers

data structures, divide and conquer

Mike and Friends

data structures, string suffix structures, strings, trees

Listening to Music

constructive algorithms, data structures

Duck Hunt

data structures

Summer Dichotomy

2-sat, data structures, dfs and similar, greedy

Tavas on the Path

data structures, divide and conquer, trees

Landmarks

data structures, dp

Berland Miners

binary search, data structures, dfs and similar, greedy, trees

Pudding Monsters

data structures, divide and conquer

And Yet Another Bracket Sequence

data structures, greedy, hashing, string suffix structures, strings

Sharti

data structures, games

Birthday

data structures, dfs and similar, dp, trees

Tourists

data structures, dfs and similar, graphs, trees

Conveyor Belts

data structures

ELCA

data structures, trees

Parking Lot

data structures, divide and conquer

Dreamoon and Notepad

data structures

Meta-universe

data structures

Design Tutorial: Increase the Constraints

bitmasks, data structures, fft

MUH and Lots and Lots of Segments

data structures, dsu

The Classic Problem

data structures, graphs, shortest paths

Function

data structures

Serega and Fun

data structures

Little Pony and Lord Tirek

data structures

Permutation

data structures, divide and conquer, hashing

Banners

brute force, data structures, dp

Tricky Password

data structures

Big Problems for Organizers

data structures, graphs, trees

Mashmokh's Designed Problem

data structures

k-d-sequence

data structures

Two Rooted Trees

data structures, implementation, trees

Jeff and Removing Periods

data structures

Escaping on Beaveractor

data structures, implementation, trees

Ping-Pong

data structures

Mystic Carvings

data structures

Close Vertices

data structures, divide and conquer, trees

Cow Tennis Tournament

combinatorics, data structures, math

Sequence Transformation

brute force, data structures, dp, implementation, math

k-Maximum Subsequence Sum

data structures, flows, graphs, implementation

Mirror Room

data structures, implementation

Roadside Trees

data structures, dp

Donkey and Stars

data structures, dp, geometry, math, sortings

Matrix

data structures

Cubes

data structures, dp, geometry, two pointers

Friends

binary search, bitmasks, data structures, math