New Year Presents

constructive algorithms, data structures

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Place Your Ad Here

data structures, sortings

Project Manager

brute force, data structures, implementation

Startup Funding

binary search, constructive algorithms, data structures, probabilities, two pointers

Two permutations

data structures

Four Divisors

data structures, dp, math, number theory, sortings, two pointers

Buses and People

binary search, data structures, sortings

Fire in the City

binary search, data structures

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Lucky Arrays

data structures

Cinema

brute force, data structures

Katya and Segments Sets

data structures, interactive, sortings

Vicky's Delivery Service

data structures, dsu, graphs, hashing

Bear and Contribution

data structures, greedy, sortings, two pointers

Comfortably Numb

bitmasks, data structures, divide and conquer, strings, trees

Unique Array

binary search, data structures, divide and conquer, dp, greedy

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Economic Difficulties

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

Anniversary

data structures, implementation, math, matrices, number theory

New Year and Three Musketeers

data structures, greedy, sortings

Sleep in Class

constructive algorithms, data structures, math, two pointers

Lemper Cooking Competition

data structures

Cutlet

data structures, dp

Trees and XOR Queries Again

data structures, dfs and similar, divide and conquer, graphs, implementation, math, trees

Morse Code

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

Cookies

binary search, data structures, dfs and similar, dp, games, trees

Greedy Subsequences

data structures, dp, trees

Deduction Queries

data structures, dsu

Choose a Square

binary search, data structures, sortings

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

Vasya and Maximum Profit

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

The Cake Is a Lie

constructive algorithms, data structures, dfs and similar, graphs

Garlands

data structures

Labeling the Tree with Distances

data structures, dp, greedy, hashing, implementation, trees

Sonya and Ice Cream

binary search, data structures, dp, greedy, shortest paths, trees

Frequency Queries

data structures, dfs and similar, trees

Magician and Pigs (Easy Version)

brute force, data structures, implementation

House Planning

constructive algorithms, data structures, graph matchings, greedy

Inversions After Shuffle

data structures, probabilities

Little Elephant and Tree

data structures, dfs and similar, trees

Three strings

data structures, dsu, string suffix structures, strings

Traffic Jams in the Land

data structures, dp, number theory

Permutation and Queries

brute force, data structures, divide and conquer, two pointers

King Kog's Reception

data structures

Developing Game

data structures

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Acyclic Organic Compounds

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

Distance Tree (easy version)

binary search, data structures, dfs and similar, graphs, shortest paths, trees

Beautiful Mirrors with queries

data structures, probabilities

Rooks and Rectangles

data structures, sortings

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

Happy Tree Party

data structures, dfs and similar, graphs, math, trees

Restore the Permutation by Sorted Segments

brute force, constructive algorithms, data structures, greedy, implementation

Leaf Sets

data structures, dfs and similar, dsu, graphs, greedy, sortings, trees

Good Subarrays (Hard Version)

binary search, data structures, dp, two pointers

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Josuke and Complete Graph

binary search, brute force, data structures, math, number theory

RBS

binary search, bitmasks, brute force, data structures, dp

Animal Observation (hard version)

data structures, dp, greedy

Little Elephant and Inversions

data structures, two pointers

Split the Tree

binary search, data structures, dp, greedy, trees

Bracket Cost

binary search, data structures, divide and conquer, dp, greedy, strings

Linear Kingdom Races

data structures, dp

Balance (Hard version)

brute force, data structures, number theory

Palindromes in a Tree

bitmasks, data structures, divide and conquer, trees

Purple Crayon

data structures, dfs and similar, games, graphs, greedy, math, sortings, trees

Flying Sort (Hard Version)

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

Ina of the Mountain

data structures, dp, greedy, math

Spanning Tree Queries

binary search, data structures, dfs and similar, dsu, graphs, greedy, math, sortings, trees

The Untended Antiquity

data structures, hashing

Intersection of Permutations

data structures

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

Tonya and Burenka-179

data structures, greedy, math, number theory

Cross Swapping

2-sat, data structures, dsu, greedy, matrices

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Reverse and Swap

binary search, bitmasks, data structures

Jamie and Tree

data structures, trees

Minimum Array

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

Fair Share

constructive algorithms, data structures, dfs and similar, graph matchings, graphs

Long Way Home

data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths

Lucky Array

data structures

Network Coverage

binary search, constructive algorithms, data structures, greedy

Arthur and Walls

constructive algorithms, data structures, graphs, greedy, shortest paths

Chopping Carrots (Hard Version)

brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers

A-Z Graph

constructive algorithms, data structures, graphs, hashing

String Set Queries

brute force, data structures, hashing, interactive, string suffix structures, strings

Xor-Subsequence (hard version)

bitmasks, data structures, dp, strings, trees

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Colorful Operations

brute force, data structures, implementation

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory

William The Oblivious

bitmasks, data structures, dp, matrices

Copy or Prefix Sum

combinatorics, data structures, dp, sortings

Avoid Rainbow Cycles

data structures, dsu, graphs, greedy, sortings, trees

Omkar and Landslide

binary search, constructive algorithms, data structures, greedy, math

Bombs

data structures, two pointers

Ball

data structures, sortings

Bindian Signalizing

data structures

DeadLee

data structures, dfs and similar, greedy, implementation, sortings