Powerful array

data structures, implementation, math, two pointers

Circular RMQ

data structures

XOR and Favorite Number

data structures

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Gerald and Giant Chess

combinatorics, dp, math, number theory

Magic Numbers

dp

Clear the Multiset

data structures, divide and conquer, dp, greedy

Erase and Extend (Hard Version)

binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers

Multiples and Power Differences

constructive algorithms, graphs, math, number theory

Discrete Centrifugal Jumps

data structures, dp, graphs

The Bakery

binary search, data structures, divide and conquer, dp, two pointers

A Simple Task

bitmasks, dp, graphs

Great Vova Wall (Version 1)

greedy, implementation, math

Sequence

dp, sortings

Powerful Ksenia

bitmasks, constructive algorithms, math

Kate and imperfection

greedy, implementation, math, number theory, sortings, two pointers

Cleaning

data structures, dp, greedy, math

Magic Stones

constructive algorithms, math, sortings

Almost Difference

data structures, math

0-1-Tree

dfs and similar, divide and conquer, dp, dsu, trees

Duff in the Army

data structures, trees

Strange Housing

constructive algorithms, dfs and similar, graph matchings, graphs, greedy

Sum of Paths

combinatorics, dp, math

Palindrome Degree

hashing, strings

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

To Go Or Not To Go?

brute force, dfs and similar, graphs, greedy, implementation, shortest paths

Game on Tree

implementation, math, probabilities, trees

Non-Decreasing Dilemma

data structures, divide and conquer, math

GukiZ hates Boxes

binary search, greedy

Three Sequences

constructive algorithms, data structures, greedy, math

Phoenix and Computers

combinatorics, dp, math

Sausage Maximization

bitmasks, data structures, trees

Earn or Unlock

bitmasks, brute force, dp

Kaavi and Magic Spell

dp, strings

Make It Increasing

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

Equal Tree Sums

constructive algorithms, dfs and similar, math, trees

Almost Acyclic Graph

dfs and similar, graphs

Jongmah

dp

Minimal Segment Cover

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

Travelling Salesman Problem

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

Calendar Ambiguity

math, number theory

Reverse Card (Hard Version)

brute force, math, number theory

Infinite Path

brute force, dfs and similar, graphs, math, number theory

Decreasing Heights

brute force, dp

Make k Equal

greedy

Salyg1n and Array (hard version)

constructive algorithms, interactive

Perfect Triples

bitmasks, brute force, constructive algorithms, divide and conquer, math

Marbles

bitmasks, dp

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Guess the K-th Zero (Hard version)

binary search, constructive algorithms, data structures, interactive

Great Vova Wall (Version 2)

data structures, implementation

Paint the Middle

dp, greedy, sortings, two pointers

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Balanced String

dp

Telepanting

binary search, data structures, dp, sortings

Jon and Orbs

dp, math, probabilities

Arithmetic Progression

binary search, interactive, number theory, probabilities

Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers

Keyboard Purchase

bitmasks, dp

Trees and Segments

brute force, data structures, dp, greedy, two pointers

Sum of Remainders

implementation, math, number theory

Sum of Digits

brute force, constructive algorithms, dp, greedy

Winter is here

combinatorics, dp, math, number theory

Tree Master

brute force, data structures, dfs and similar, trees

Trips

graphs

Gold Transfer

binary search, data structures, dp, greedy, interactive, trees

Three States

dfs and similar, graphs, shortest paths

Divisor Paths

combinatorics, graphs, greedy, math, number theory

Antenna Coverage

data structures, dp, greedy, sortings

Minimum Possible LCM

brute force, greedy, math, number theory

Persistent Bookcase

bitmasks, data structures, dfs and similar, implementation

Prefixes and Suffixes

constructive algorithms, strings, two pointers

New Game Plus!

constructive algorithms, greedy, math

Tricky Function

data structures, divide and conquer, geometry

Erase Subsequences

dp, strings

Makoto and a Blackboard

dp, math, number theory, probabilities

Tourism

dfs and similar, dp, dsu, graphs, greedy, trees

Nature Reserve

binary search, geometry, ternary search

Priority Queue

combinatorics, dp, implementation, math, ternary search

Vika and Bonuses

binary search, brute force, math, ternary search

Equilibrium

data structures, dp, greedy

Madoka and The Best University

math, number theory

Sum Over Zero

data structures, dfs and similar, dp

Ezzat and Grid

data structures, dp, greedy

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Mr. Kitayuta's Technology

dfs and similar

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Happy Line

constructive algorithms, greedy, sortings

Lexicographically Small Enough

brute force, data structures, greedy, strings

Yet Another Substring Reverse

bitmasks, dp

Ring Road 2

2-sat, dfs and similar, dsu, graphs

Figure Fixing

constructive algorithms, dfs and similar, dsu, graphs, greedy, math

Kill Anton

brute force, constructive algorithms, data structures, math, strings

Super M

dfs and similar, dp, graphs, trees

Permutation Separation

data structures, divide and conquer

Delivery Bears

binary search, flows, graphs

And Reachability

bitmasks, dp

Anonymity Is Important

binary search, brute force, data structures, dsu, greedy, sortings