Crossing the Railways

data structures, dp

BinaryStringForces

constructive algorithms, data structures, dp

AquaMoon and Potatoes

brute force, data structures, dp

AquaMoon and Time Stop (easy version)

data structures, dp

Ruler Of The Zoo

brute force, data structures

Two Avenues

data structures, dfs and similar, graphs

Copium Permutation

constructive algorithms, data structures, greedy

AquaMoon and Time Stop (hard version)

data structures, dp

Spaceship Crisis Management

binary search, data structures, geometry, sortings

Olympiad Training

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

Arranging Crystal Balls

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

Balanced Distribution

data structures, dp, greedy

LuoTianyi and Cartridge

data structures, trees

Ela Takes Dancing Class

binary search, data structures

Bully Sort

data structures, math

Optimal Encoding

brute force, data structures

Willy-nilly, Crack, Into Release!

data structures, dp

Palindromic Magic

data structures, hashing, strings

Two Sequences

data structures, hashing, string suffix structures

Cut the pie

binary search, data structures, geometry

The Ultimate LIS Problem

data structures, greedy

Balance the Cards

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

Red Blue Tree

data structures, implementation, trees

Alphabetic Tree

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

Flow Control

data structures, dsu, implementation

Growing flowers

data structures

Journey

data structures, divide and conquer, graphs, trees

Cheat and Win

bitmasks, data structures, games, trees

Holy Diver

data structures

Hopping Around the Array

data structures, dp

Range Diameter Sum

data structures, trees

The Fair Nut's getting crazy

data structures, implementation

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Speckled Band

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

Jumping Through the Array

binary search, data structures, graphs, two pointers

My Beautiful Madness

data structures, trees

Minimize Inversions Number

data structures, greedy, math, sortings

Beautiful fountains rows

data structures

Intervals of Intervals

binary search, data structures, two pointers

Replace

binary search, data structures

Railway Construction

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

Lada Malina

data structures, geometry

Pisces

data structures, flows, trees

Balls and Pockets

data structures

Turing's Award

data structures, dp

Upside Down

data structures, string suffix structures, strings, trees

Rap God

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

Doremy's Paint 2

data structures

Treasure Hunt

data structures, divide and conquer, two pointers

A task for substrings

data structures, string suffix structures, strings

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Caramel Clouds

data structures, dp, sortings

Iqea

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

Gregor and the Two Painters

data structures, divide and conquer, graphs, greedy, math

Stations

data structures

Phoenix and Diamonds

binary search, data structures, sortings

Summer Oenothera Exhibition

data structures

Outermost Maximums

data structures, greedy

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Exam

data structures, string suffix structures, trees

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Matches Are Not a Child's Play

data structures, trees

Yuezheng Ling and Dynamic Tree

data structures, trees

Niyaz and Small Degrees

data structures, dp, trees

Nezzar and Tournaments

data structures, greedy

Burenka, an Array and Queries

data structures, math, number theory

Johnny and New Toy

data structures, implementation, math

Moving Walkways

data structures, greedy, math

MEX Tree Manipulation

data structures, trees

Codeforces Scoreboard

binary search, data structures, dp, geometry

Palindrome Addicts

data structures, strings

Subset Trick

binary search, data structures

AmShZ Wins a Bet

data structures, greedy, hashing

A Certain Magical Party

combinatorics, data structures, greedy, sortings

Strange Sort

data structures, sortings

Fishingprince Plays With Array Again

brute force, data structures, geometry, math

Squares

constructive algorithms, data structures, dp, graphs, trees

Permutation for Burenka

data structures, graph matchings, greedy, math, trees

The Fair Nut and Amusing Xor

data structures

Median Mountain Range

data structures

Gates to Another World

bitmasks, data structures, dsu, two pointers

Iron Man

data structures, geometry, trees

Nauuo and ODT

data structures

Rainbow Triples

binary search, data structures, flows, greedy

Rainbow Rectangles

data structures, sortings, two pointers

Arkady and Rectangles

data structures

Omkar and Tours

data structures, divide and conquer, sortings, trees

Organizing a Race

data structures, greedy

Nauuo and Bug

data structures

The Winds of Winter

binary search, data structures

Bear and Chemistry

data structures, dfs and similar, graphs, trees

Nastya and CBS

brute force, data structures, hashing

Cartesian Tree

data structures

A New Beginning

data structures, dp, geometry, sortings

Number of Components

data structures

String Journey

data structures, dp, string suffix structures

Painting Edges

binary search, data structures

Physical Examination

*special problem, binary search, data structures

Two Arrays

data structures, matrices