Flower Shop

*special problem, data structures, fft, math

Falling Blocks

*special problem, data structures

Game with Segments

*special problem, data structures, games

Build From Suffixes

*special problem, combinatorics, data structures

Ruler Of The Zoo

brute force, data structures

Guarding warehouses

data structures, geometry

Game with Two Trees

data structures

Pisces

data structures, flows, trees

Lada Malina

data structures, geometry

Expression Queries

data structures

Growing flowers

data structures

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Array Covering

data structures

Red Blue Tree

data structures, implementation, trees

Balls and Pockets

data structures

Hopping Around the Array

data structures, dp

My Beautiful Madness

data structures, trees

Palindromic Magic

data structures, hashing, strings

MUH and Lots and Lots of Segments

data structures, dsu

Balance the Cards

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

Balanced Distribution

data structures, dp, greedy

Heaven Tour

data structures, greedy

Cheat and Win

bitmasks, data structures, games, trees

Optimal Encoding

brute force, data structures

Recover Polygon (hard)

data structures

Duck Hunt

data structures

Upside Down

data structures, string suffix structures, strings, trees

Graph Coloring

data structures, graphs, interactive

Nezzar and Tournaments

data structures, greedy

Painting Numbers

*special problem, data structures, greedy, number theory

Cut the pie

binary search, data structures, geometry

Visible Black Areas

data structures, dsu, geometry, trees

Soap Time! - 2

binary search, data structures

Johnny and New Toy

data structures, implementation, math

Name the album

*special problem, data structures, implementation

Phoenix and Diamonds

binary search, data structures, sortings

Range Diameter Sum

data structures, trees

Mixture

*special problem, data structures, geometry, math, sortings

Dreamoon and Notepad

data structures

Moving Walkways

data structures, greedy, math

Holy Diver

data structures

Detect Robots

data structures, strings

Rap God

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

Speckled Band

data structures, divide and conquer, hashing, string suffix structures, strings

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Caramel Clouds

data structures, dp, sortings

Train Tracks

data structures, trees

Movie Fan

*special problem, data structures, greedy, implementation, sortings

Moonwalk challenge

data structures, strings, trees

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Journey

data structures, divide and conquer, graphs, trees

Bakery

data structures, dsu

Boring Card Game

data structures, greedy, trees

The Fair Nut and Amusing Xor

data structures

Subset Trick

binary search, data structures

Dogecoin

*special problem, *special problem, binary search, data structures

Secret Letters

data structures, dp, greedy

Slalom

data structures, dp, sortings

Median Mountain Range

data structures

Mages and Monsters

data structures, geometry

Santa's Gift

data structures, trees

Sequence Transformation

data structures, dp, implementation, math

Escaping on Beaveractor

data structures, implementation, trees

Sequence Recovery

bitmasks, data structures, greedy

The Fair Nut's getting crazy

data structures, implementation

Matrix

data structures

Mashmokh's Designed Problem

data structures

Exam

data structures, string suffix structures, trees

Line Distance

binary search, data structures, geometry

Ants

2-sat, data structures, trees

Squares

constructive algorithms, data structures, dp, graphs, trees

Split

binary search, data structures, dp, greedy

Cartesian Tree

data structures

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Into Blocks (hard version)

data structures

Iqea

data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees

Mahmoud and Ehab and the final stage

data structures, strings

Fedya the Potter Strikes Back

data structures, strings

Yet Another Partiton Problem

data structures, divide and conquer, dp, geometry, two pointers

Rainbow Triples

binary search, data structures, flows, greedy

Strange Permutation

binary search, combinatorics, data structures, dp, graphs, implementation, two pointers

Nauuo and Bug

data structures

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

Two Rooted Trees

data structures, implementation, trees

Qingshan and Daniel

brute force, data structures, greedy, implementation

Impressive Harvesting of The Orchard

data structures

Listening to Music

constructive algorithms, data structures

Landmarks

data structures, dp

Palindromic Doubles

*special problem, data structures, dp

ELCA

data structures, trees

Dirty Arkady's Kitchen

data structures, dp, graphs, shortest paths

Summer Oenothera Exhibition

data structures

Nastya and CBS

brute force, data structures, hashing

April Fools' Problem (hard)

binary search, data structures, flows

Meta-universe

data structures

Shooting Gallery

data structures, implementation

Lanterns

binary search, data structures, dp

Tricky Password

data structures

Inna and Babies

binary search, data structures, dsu, geometry, implementation

Supercollider

data structures