Falling Blocks

*special problem, data structures

Flower Shop

*special problem, data structures, fft, math

Burenka and Pether

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

Game with Segments

*special problem, data structures, games

Build From Suffixes

*special problem, combinatorics, data structures

Farmer John's Favorite Intern

data structures, dp, flows, trees

Physical Examination

*special problem, binary search, data structures

Parallel Swaps Sort

constructive algorithms, data structures

Crossing the Railways

data structures, dp

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Lada Malina

data structures, geometry

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Two Arrays

data structures, matrices

Doremy's Average Tree

data structures, dp, greedy, trees

LIS?

data structures, greedy, implementation

Guarding warehouses

data structures, geometry

A Battle Against a Dragon

*special problem, data structures, dp

BinaryStringForces

constructive algorithms, data structures, dp

Ruler Of The Zoo

brute force, data structures

AquaMoon and Time Stop (easy version)

data structures, dp

Sum of Digits of Sums

*special problem, binary search, data structures

Standard Graph Problem

data structures, graphs, greedy, trees

AquaMoon and Time Stop (hard version)

data structures, dp

Submatrices

*special problem, bitmasks, data structures, dp

MUH and Lots and Lots of Segments

data structures, dsu

Expression Queries

data structures

Spaceship Crisis Management

binary search, data structures, geometry, sortings

Olympiad Training

binary search, data structures, dp, flows, geometry, implementation, sortings

Recover Polygon (hard)

data structures

Heaven Tour

data structures, greedy

Panda Meetups

data structures, dp, flows

Palindromic Magic

data structures, hashing, strings

Two Avenues

data structures, dfs and similar, graphs

AquaMoon and Potatoes

brute force, data structures, dp

Автобус

binary search, data structures, greedy, sortings

Soap Time! - 2

binary search, data structures

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

Copium Permutation

constructive algorithms, data structures, greedy

Cut the pie

binary search, data structures, geometry

Ela Takes Dancing Class

binary search, data structures

Two Sequences

data structures, hashing, string suffix structures

Name the album

*special problem, data structures, implementation

Desert

data structures, graphs

Freak Joker Process

binary search, data structures, sortings

Pisces

data structures, flows, trees

Game with Two Trees

data structures

Movie Fan

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

Clubstep

binary search, brute force, data structures, greedy, trees

Optimal Encoding

brute force, data structures

Painting Numbers

*special problem, data structures, greedy, number theory

Nezzar and Tournaments

data structures, greedy

Mixture

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

Balanced Distribution

data structures, dp, greedy

Upside Down

data structures, string suffix structures, strings, trees

Almost Certainly

*special problem, constructive algorithms, data structures, sortings

LuoTianyi and Cartridge

data structures, trees

Visible Black Areas

data structures, dsu, geometry, trees

Duck Hunt

data structures

Willy-nilly, Crack, Into Release!

data structures, dp

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Dreamoon and Notepad

data structures

Balance the Cards

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

Balls and Pockets

data structures

Moving Walkways

data structures, greedy, math

Rap God

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

PermutationForces

data structures, greedy

The Ultimate LIS Problem

data structures, greedy

Turing's Award

data structures, dp

Red Blue Tree

data structures, implementation, trees

Johnny and New Toy

data structures, implementation, math

Array Covering

data structures

Detect Robots

data structures, strings

Burenka, an Array and Queries

data structures, math, number theory

Treasure Hunt

data structures, divide and conquer, two pointers

Alphabetic Tree

binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees

Decent Division

constructive algorithms, data structures

Cyclic Sum

data structures, fft, number theory

Rivalries

constructive algorithms, data structures, greedy

Diamond Theft

data structures, greedy

Moonwalk challenge

data structures, strings, trees

Doremy's Paint 2

data structures

Dogecoin

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

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Escaping on Beaveractor

data structures, implementation, trees

Sequence Recovery

bitmasks, data structures, greedy

Frequency Mismatch (Hard Version)

binary search, data structures, dfs and similar, hashing, probabilities, trees

Matrix

data structures

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

ELCA

data structures, trees

Growing flowers

data structures

Supercollider

data structures

Inna and Babies

binary search, data structures, dsu, geometry, implementation

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Iqea

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

Graph Coloring

data structures, graphs, interactive

Two Posters

brute force, data structures, greedy, two pointers

Wizards and Roads

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

Mashmokh's Designed Problem

data structures

Two Circles

brute force, data structures, implementation