Segment Covering

brute force, combinatorics, constructive algorithms, data structures, dp, trees

Raining season

data structures, divide and conquer, trees

New Year and Social Network

data structures, graph matchings, graphs, math, trees

Boring Card Game

data structures, greedy, trees

Sharti

data structures, games

Triameter

binary search, data structures, dfs and similar, trees

Strange Permutation

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

Feeling Good

bitmasks, data structures

Sasha and Algorithm of Silence's Sounds

data structures, trees

Listening to Music

constructive algorithms, data structures

Split

binary search, data structures, dp, greedy

Line Distance

binary search, data structures, geometry

Inverse Inversions

binary search, brute force, data structures

Ants

2-sat, data structures, trees

The Third Grace

data structures, dp

Mashmokh's Designed Problem

data structures

Two Posters

brute force, data structures, greedy, two pointers

ELCA

data structures, trees

Detect Robots

data structures, strings

Expression Queries

data structures

Two Arrays

data structures, matrices

Physical Examination

*special problem, binary search, data structures

Next and Prev

brute force, data structures, implementation

Painting Edges

binary search, data structures

String Journey

data structures, dp, string suffix structures

Number of Components

data structures

A New Beginning

data structures, dp, geometry, sortings

Cartesian Tree

data structures

Nastya and CBS

brute force, data structures, hashing

Nauuo and Bug

data structures

Organizing a Race

data structures, greedy

Bear and Chemistry

data structures, dfs and similar, graphs, trees

AmShZ Wins a Bet

data structures, greedy, hashing

The Winds of Winter

binary search, data structures

Strange Sort

data structures, sortings

Rainbow Triples

binary search, data structures, flows, greedy

Arkady and Rectangles

data structures

Omkar and Tours

data structures, divide and conquer, sortings, trees

Gates to Another World

bitmasks, data structures, dsu, two pointers

Rainbow Rectangles

data structures, sortings, two pointers

Median Mountain Range

data structures

Nauuo and ODT

data structures

Permutation for Burenka

data structures, graph matchings, greedy, math, trees

A Certain Magical Party

combinatorics, data structures, greedy, sortings

Squares

constructive algorithms, data structures, dp, graphs, trees

Iron Man

data structures, geometry, trees

Fishingprince Plays With Array Again

brute force, data structures, geometry, math

The Fair Nut and Amusing Xor

data structures

Ball-Stackable

constructive algorithms, data structures, dp, trees

Palindrome Addicts

data structures, strings

Subset Trick

binary search, data structures

MEXanization

data structures

Codeforces Scoreboard

binary search, data structures, dp, geometry

MEX Tree Manipulation

data structures, trees

Diamond Theft

data structures, greedy

Johnny and New Toy

data structures, implementation, math

Burenka, an Array and Queries

data structures, math, number theory

Moving Walkways

data structures, greedy, math

Nezzar and Tournaments

data structures, greedy

Conference

data structures, flows

Yuezheng Ling and Dynamic Tree

data structures, trees

Niyaz and Small Degrees

data structures, dp, trees

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Matches Are Not a Child's Play

data structures, trees

Exam

data structures, string suffix structures, trees

Outermost Maximums

data structures, greedy

Oleg and chess

data structures, divide and conquer, flows, graph matchings

A task for substrings

data structures, string suffix structures, strings

Gregor and the Two Painters

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

Summer Oenothera Exhibition

data structures

Stations

data structures

Phoenix and Diamonds

binary search, data structures, sortings

Caramel Clouds

data structures, dp, sortings

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

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Doremy's Paint 2

data structures

Rivalries

constructive algorithms, data structures, greedy

Treasure Hunt

data structures, divide and conquer, two pointers

Turing's Award

data structures, dp

Rap God

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

Balls and Pockets

data structures

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Upside Down

data structures, string suffix structures, strings, trees

Pisces

data structures, flows, trees

Railway Construction

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

Lada Malina

data structures, geometry

Replace

binary search, data structures

Intervals of Intervals

binary search, data structures, two pointers

Beautiful fountains rows

data structures

Minimize Inversions Number

data structures, greedy, math, sortings

My Beautiful Madness

data structures, trees

Jumping Through the Array

binary search, data structures, graphs, two pointers

Range Diameter Sum

data structures, trees

Holy Diver

data structures

Hopping Around the Array

data structures, dp

Bully Sort

data structures, math

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