Riverside Curio

data structures, dp, greedy

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

Tree Construction

data structures, trees

Fountains

binary search, data structures, implementation

Water Balance

data structures, geometry, greedy

Watching Fireworks is Fun

data structures, dp, math

Yet Another Sorting Problem

data structures, math

Even Path

data structures, implementation

Kirill and Mushrooms

data structures, sortings

Vasya and a Tree

data structures, trees

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Portal

brute force, data structures, dp, greedy, implementation

Petya and Divisors

binary search, data structures, number theory

One Occurrence

data structures, divide and conquer

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Cyclic MEX

data structures, implementation, math, two pointers

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

DZY Loves Modification

brute force, data structures, greedy

Non-Decreasing Dilemma

data structures, divide and conquer, math

Optimal Partition

data structures, dp

Sum of Progression

brute force, data structures, dp, implementation, math

Tufurama

data structures

Feed Cats

data structures, dp, sortings

Cashback

data structures, dp, greedy, math

Money Transfers

constructive algorithms, data structures, greedy, sortings

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

A Growing Tree

data structures, dfs and similar, trees

Xor Tree

binary search, bitmasks, data structures, divide and conquer, dp, trees

Multicolored Cars

data structures, implementation

Mishka and Interesting sum

data structures

Sasha and Array

data structures, math, matrices

Lazy Student

constructive algorithms, data structures, graphs

Shop Game

data structures, greedy, math, sortings

Three Sequences

constructive algorithms, data structures, greedy, math

Sausage Maximization

bitmasks, data structures, trees

Strip

binary search, data structures, dp, two pointers

The Wu

bitmasks, brute force, data structures

Messenger Simulator

data structures

Monocarp and the Set

combinatorics, data structures, math

Permutation Addicts

constructive algorithms, data structures, dfs and similar, dsu, graphs, trees

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Beautiful Mirrors

data structures, dp, math, probabilities

Mahmoud and a Dictionary

data structures, dfs and similar, dp, dsu, graphs

Count the Trains

binary search, data structures, greedy, sortings

Pencils and Boxes

binary search, data structures, dp, greedy, two pointers

Music Festival

binary search, data structures, dp, greedy, sortings

Vitya and Strange Lesson

binary search, data structures

Cats Transport

data structures, dp

Count Paths

data structures, dfs and similar, dp, dsu, graphs, trees

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

DZY Loves Fibonacci Numbers

data structures, math, number theory

Division + LCP (easy version)

binary search, data structures, dp, hashing, string suffix structures, strings

Willem, Chtholly and Seniorious

data structures, probabilities

Correct Bracket Sequence Editor

data structures, dsu, strings

Yet Another Array Queries Problem

data structures, implementation

Pillars

binary search, data structures, dp, sortings, trees

Restructuring Company

data structures, dsu

Generating Sets

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

Bracket Walk

data structures, greedy, strings

Nezzar and Binary String

data structures, greedy

Friends and Subsequences

binary search, data structures

New Year and Fireworks

brute force, data structures, dfs and similar, dp, implementation

MEX vs DIFF

binary search, brute force, constructive algorithms, data structures, greedy, two pointers

Number of Components

combinatorics, data structures, dp, math

Almost Triple Deletions

data structures, dp, greedy

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Centroids

data structures, dfs and similar, dp, graphs, greedy, trees

Exposition

binary search, data structures, dsu, trees, two pointers

Expand the Path

brute force, combinatorics, data structures, implementation, math

Minimal Labels

data structures, dfs and similar, graphs, greedy

Monsters

brute force, data structures, dfs and similar, dsu, graphs, greedy

Blood Cousins Return

binary search, data structures, dfs and similar, dp, sortings

Bank Hacking

constructive algorithms, data structures, dp, trees

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Closest Equals

*special problem, data structures

Let's Play the Words?

data structures, hashing, implementation, math

Turn Off The TV

data structures, sortings

Skyline Photo

data structures, divide and conquer, dp

Lucky Queries

data structures

Vlad and the Mountains

binary search, data structures, dsu, graphs, implementation, sortings, trees, two pointers

Credit Card

data structures, dp, greedy, implementation

OpenStreetMap

data structures, two pointers

String Manipulation 1.0

*special problem, binary search, brute force, data structures, strings

Unusual Entertainment

data structures, dfs and similar, dsu, shortest paths, sortings, trees, two pointers

Little Artem and Time Machine

data structures

New Year and Conference

binary search, data structures, hashing, sortings

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Guess the K-th Zero (Hard version)

binary search, constructive algorithms, data structures, interactive

Pictures with Kittens (hard version)

data structures, dp

Beautiful Subarrays

data structures, divide and conquer, strings, trees

Workout plan

data structures, greedy

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Tyler and Strings

combinatorics, data structures, implementation

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Great Vova Wall (Version 2)

data structures, implementation

Serega and Fun

data structures