Long Way Home

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

The Number of Subpermutations

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

ace5 and Task Order

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

Unique Occurrences

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

Bear and Bowling 4

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

Max to the Right of Min

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

Omsk Metro (hard version)

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

New Year and Old Subsequence

data structures, divide and conquer, dp, matrices

Three Occurrences

data structures, divide and conquer, hashing, two pointers

Ray in the tube

data structures, divide and conquer, dp, math

Practice

constructive algorithms, divide and conquer, implementation

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

MinimizOR

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

Palindromes in a Tree

bitmasks, data structures, divide and conquer, trees

Lucky Tickets

divide and conquer, dp, fft

Bracket Cost

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

Permutation

data structures, divide and conquer, hashing

Rebrending

brute force, data structures, divide and conquer, implementation

Yurii Can Do Everything

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

Longest Array Deconstruction

data structures, divide and conquer, dp, sortings

Close Vertices

data structures, divide and conquer, trees

Goodbye Souvenir

data structures, divide and conquer

Minibuses on Venus (easy version)

combinatorics, divide and conquer, dp

Defender of Childhood Dreams

bitmasks, constructive algorithms, divide and conquer

Pastoral Oddities

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

Package Delivery

data structures, divide and conquer, greedy

Decomposition

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

Mischievous Shooter

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

Extending Set of Points

data structures, divide and conquer, dsu

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities

Permutation and Queries

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

Minimal String Xoration

bitmasks, data structures, divide and conquer, greedy, hashing, sortings, strings

Magic Matrix

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

Swap and Maximum Block

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

Dynamic Diameter

*special problem, data structures, dfs and similar, divide and conquer, trees

Cats on the Upgrade (easy version)

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

Unique Array

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

Blueprint for Seating

combinatorics, divide and conquer, math

Minimum Sum

divide and conquer, geometry, sortings

Trees and XOR Queries Again

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

Sum the Fibonacci

bitmasks, divide and conquer, dp, fft, math

One-Based Arithmetic

brute force, dfs and similar, divide and conquer

PolandBall and Many Other Balls

combinatorics, divide and conquer, dp, fft, math, number theory

Approximate Diameter

binary search, divide and conquer, graphs, shortest paths

Song of the Sirens

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

Yura and Developers

data structures, divide and conquer

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Lena and Queries

data structures, divide and conquer, geometry

Comfortably Numb

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

Split

binary search, data structures, divide and conquer, dsu, math, trees, two pointers

Superset

constructive algorithms, divide and conquer

Serious Business

data structures, divide and conquer, dp, implementation, shortest paths

Keep XOR Low

bitmasks, combinatorics, data structures, divide and conquer, dp, math

Freezing with Style

binary search, data structures, divide and conquer, trees

Decinc Dividing

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

Anti-Theft Road Planning

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

Pawns

data structures, divide and conquer, greedy

Zeros and Ones

bitmasks, divide and conquer, dp, math

Subsequence

brute force, divide and conquer, dp, greedy, trees

Paint Tree

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

Vova Escapes the Matrix

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

BinCoin

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

Interesting Sections

data structures, divide and conquer, meet-in-the-middle, two pointers

Find a car

combinatorics, divide and conquer, dp

Sum of Prefix Sums

data structures, divide and conquer, geometry, trees

Surprise me!

divide and conquer, math, number theory, trees

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy

Sonya and Bitwise OR

bitmasks, data structures, divide and conquer

New Year Shopping

divide and conquer, dp

Logistical Questions

dfs and similar, divide and conquer, trees

Pumping Stations

brute force, dfs and similar, divide and conquer, flows, graphs, greedy, trees

Quick Tortoise

bitmasks, divide and conquer, dp

XOR and Distance

bitmasks, divide and conquer, trees

Maze 2D

data structures, divide and conquer

Tree Coloring

combinatorics, divide and conquer, fft

XOR Partition

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

Jellyfish and Miku

divide and conquer, dp, math, probabilities

Minibuses on Venus (medium version)

combinatorics, divide and conquer, dp, matrices

Abracadabra

divide and conquer

Lenient Vertex Cover

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

Jumping Around

binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths

Number Clicker

divide and conquer, graphs, meet-in-the-middle, number theory

Maximums and Minimums

combinatorics, data structures, divide and conquer, number theory

Artistic Partition

divide and conquer, dp, number theory

Battalion Strength

data structures, divide and conquer, probabilities

Divisor Set

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

Vus the Cossack and a Field

divide and conquer, implementation, math

Forced Online Queries Problem

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

Empty Rectangles

divide and conquer, two pointers

Parking Lot

data structures, divide and conquer

Virus

data structures, divide and conquer, dsu, graphs

Julia the snail

data structures, divide and conquer, dp

Raging Thunder

data structures, divide and conquer, implementation

Travelling Through the Snow Queen's Kingdom

bitmasks, brute force, divide and conquer, graphs

Fox And Polygon

constructive algorithms, divide and conquer

Invertation in Tournament

brute force, divide and conquer, graphs, math

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Candies and Stones

divide and conquer, dp

Timofey and our friends animals

data structures, divide and conquer, dsu