Close Vertices

data structures, divide and conquer, trees

Permutation

data structures, divide and conquer, hashing

Digit Tree

dfs and similar, divide and conquer, dsu, trees

Vowels

combinatorics, divide and conquer, dp

Blue and Red of Our Faculty!

divide and conquer, dp

Doe Graphs

constructive algorithms, divide and conquer, dp, graphs, shortest paths

Formurosa

divide and conquer, dp, expression parsing

Field Should Not Be Empty

brute force, data structures, divide and conquer

Forced Online Queries Problem

data structures, divide and conquer, dsu, graphs, trees

Divisor Set

divide and conquer, fft, greedy, math, number theory

Lenient Vertex Cover

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

Tree Coloring

combinatorics, divide and conquer, fft

Sonya and Bitwise OR

bitmasks, data structures, divide and conquer

Find a car

combinatorics, divide and conquer, dp

Vova Escapes the Matrix

brute force, dfs and similar, divide and conquer, shortest paths

Pawns

data structures, divide and conquer, greedy

Song of the Sirens

combinatorics, divide and conquer, hashing, math, string suffix structures, strings

Sum the Fibonacci

bitmasks, divide and conquer, dp, fft, math

Extending Set of Points

data structures, divide and conquer, dsu

Goodbye Souvenir

data structures, divide and conquer

Rebrending

brute force, data structures, divide and conquer, implementation

New Year and Old Subsequence

data structures, divide and conquer, dp, matrices

Greedy Shopping

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

Binary Table

bitmasks, brute force, divide and conquer, dp, fft, math

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Ciel and Gondolas

data structures, divide and conquer, dp

Deck-Building Game

divide and conquer, math

Not Quick Transformation

divide and conquer, math

SmartGarden

constructive algorithms, divide and conquer

Product Tuples

divide and conquer, fft

Dish Shopping

data structures, divide and conquer

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Candies and Stones

divide and conquer, dp

Virus

data structures, divide and conquer, dsu, graphs

Vus the Cossack and a Field

divide and conquer, implementation, math

Minibuses on Venus (medium version)

combinatorics, divide and conquer, dp, matrices

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy

Zeros and Ones

bitmasks, divide and conquer, dp, math

Lena and Queries

data structures, divide and conquer, geometry

Cats on the Upgrade (easy version)

brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees

Swap and Maximum Block

bitmasks, data structures, dfs and similar, divide and conquer, dp

Defender of Childhood Dreams

bitmasks, constructive algorithms, divide and conquer

Yurii Can Do Everything

binary search, bitmasks, brute force, constructive algorithms, divide and conquer, two pointers

MinimizOR

bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers

Ray in the tube

data structures, divide and conquer, dp, math

Three Occurrences

data structures, divide and conquer, hashing, two pointers

Bear and Bowling 4

binary search, data structures, divide and conquer, geometry, ternary search

The Number of Subpermutations

brute force, data structures, divide and conquer, hashing, math

Partition Game

binary search, data structures, divide and conquer, dp

Ivan and Burgers

data structures, divide and conquer, greedy, math

Yet Another Minimization Problem

divide and conquer, dp

Xor Spanning Tree

divide and conquer, fft, graphs

Abracadabra

divide and conquer

Anti-Theft Road Planning

bitmasks, constructive algorithms, divide and conquer, greedy, interactive, math

Comfortably Numb

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

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Trees and XOR Queries Again

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

Magic Matrix

brute force, divide and conquer, graphs, matrices, trees

Permutation and Queries

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

Bracket Cost

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

Lucky Tickets

divide and conquer, dp, fft

Palindromes in a Tree

bitmasks, data structures, divide and conquer, trees

Vika and Wiki

binary search, bitmasks, combinatorics, divide and conquer, dp, math

Ehab and the Big Finale

constructive algorithms, divide and conquer, graphs, implementation, interactive, trees

Long Way Home

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

GCD Counting

divide and conquer, dp, dsu, number theory, trees

Please, another Queries on Array?

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

Fib-tree

brute force, dfs and similar, divide and conquer, number theory, trees

New Year Tree

data structures, divide and conquer, trees

Fruit Sequences

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

Till I Collapse

data structures, divide and conquer

Thief in a Shop

divide and conquer, dp, fft, math

One Occurrence

data structures, divide and conquer

Xenia and Tree

data structures, divide and conquer, trees

Superset

constructive algorithms, divide and conquer

Decomposition

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

Omsk Metro (hard version)

data structures, dfs and similar, divide and conquer, dp, math, trees

Max to the Right of Min

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

Unique Occurrences

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

Yet Another Array Counting Problem

binary search, data structures, divide and conquer, dp, flows, math, trees

Alternating Tree

combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees

Optimal Insertion

data structures, divide and conquer, dp, greedy, sortings

Two Different

constructive algorithms, divide and conquer

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

Maze 2D

data structures, divide and conquer

BinCoin

binary search, divide and conquer, hashing, implementation, probabilities, trees

Paint Tree

constructive algorithms, divide and conquer, geometry, sortings, trees

Mischievous Shooter

brute force, data structures, divide and conquer, dp, implementation

Package Delivery

data structures, divide and conquer, greedy

Minibuses on Venus (easy version)

combinatorics, divide and conquer, dp

ace5 and Task Order

constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings

Tests for problem D

constructive algorithms, dfs and similar, divide and conquer, trees

Palindrome-less Arrays

combinatorics, divide and conquer, dp

High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Permutation Separation

data structures, divide and conquer

Tricky Function

data structures, divide and conquer, geometry

Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers