Oh Sweet Beaverette

data structures, sortings

Palindromes in a Tree

bitmasks, data structures, divide and conquer, trees

Three Chairs

bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings

Difficult Mountain

data structures, dp, greedy, sortings

Performance Review

data structures

Balance (Hard version)

brute force, data structures, number theory

Linear Kingdom Races

data structures, dp

Graph Subset Problem

constructive algorithms, data structures, graphs

Split the Tree

binary search, data structures, dp, greedy, trees

Bracket Cost

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

Permutation

data structures, divide and conquer, hashing

Sanae and Giant Robot

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

Optical Experiment

binary search, data structures, dp

Distinctive Roots in a Tree

data structures, dfs and similar, dp, trees

Short Code

data structures, dp, greedy, strings, trees

Little Elephant and Inversions

data structures, two pointers

RBS

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

Bear and Bowling

data structures, greedy

Appleman and a Sheet of Paper

data structures, implementation

Queue in the Train

data structures, greedy, implementation

Exotic Queries

data structures, implementation, sortings

Josuke and Complete Graph

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

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Periodic RMQ Problem

data structures

Forensic Examination

data structures, string suffix structures

Trip to Saint Petersburg

data structures

The Classic Problem

data structures, graphs, shortest paths

Animal Observation (hard version)

data structures, dp, greedy

Nikita and stack

data structures

Radio stations

binary search, data structures

Dima and Trap Graph

binary search, data structures, dfs and similar, dsu, shortest paths, two pointers

Nastya and King-Shamans

binary search, data structures

Close Vertices

data structures, divide and conquer, trees

Rectangle Shrinking

binary search, brute force, data structures, greedy, implementation, two pointers

Rebrending

brute force, data structures, divide and conquer, implementation

Goodbye Souvenir

data structures, divide and conquer

Cardboard Box

data structures, greedy

Rollbacks (Easy Version)

brute force, data structures, dfs and similar, trees

LuoTianyi and XOR-Tree

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

Leaf Sets

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

Restore the Permutation by Sorted Segments

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

Good Subarrays (Hard Version)

binary search, data structures, dp, two pointers

Longest Array Deconstruction

data structures, divide and conquer, dp, sortings

Game with Stones

binary search, data structures, games, greedy

Legen...

data structures, dp, matrices, strings

Chain Chips

data structures, dp, matrices

Bipartite Checking

data structures, dsu, graphs

Nanosoft

binary search, data structures, dp, implementation

Swapping Problem

brute force, constructive algorithms, data structures, sortings

Frequency Problem (Hard Version)

data structures, greedy, two pointers

Getting Deals Done

binary search, data structures

Reachable Strings

data structures, hashing, strings

Bug in Code

data structures, graphs, implementation, two pointers

Light Bulbs (Hard Version)

combinatorics, data structures, dfs and similar, dp, graphs, hashing

Last Chance

data structures, implementation, strings

Zip-line

binary search, data structures, dp, hashing

Bamboo Partition

brute force, data structures, implementation, math, number theory, sortings, two pointers

Frogs and mosquitoes

data structures, greedy

LCM Sum (hard version)

brute force, data structures, math, number theory, two pointers

Happy Tree Party

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

Li Hua and Array

brute force, data structures, dsu, math, number theory, two pointers

k-Maximum Subsequence Sum

data structures, flows, graphs, implementation

Tree Generator™

data structures, implementation, trees

Rooks and Rectangles

data structures, sortings

Pastoral Oddities

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

80-th Level Archeology

brute force, data structures, greedy, sortings

Package Delivery

data structures, divide and conquer, greedy

T-Shirts

data structures

Iahub and Xors

data structures

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Fancy Fence

*special problem, data structures, dsu, implementation, math, sortings

Bipartite Segments

binary search, data structures, dfs and similar, dsu, graphs, two pointers

Decomposition

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

Beautiful Mirrors with queries

data structures, probabilities

Palindrome Partition

binary search, brute force, data structures, dp, hashing, strings

Corporation Mail

data structures, expression parsing, implementation

Tree Queries

data structures, probabilities, trees

Working routine

data structures, implementation

Games on a CD

data structures, hashing, string suffix structures, strings

Distance Learning Courses in MAC

bitmasks, brute force, data structures, greedy, math

Extending Set of Points

data structures, divide and conquer, dsu

Distance Tree (easy version)

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

Roads in Yusland

data structures, dp, greedy

Guess Your Way Out! II

data structures, implementation, sortings

Ralph And His Tour in Binary Country

brute force, data structures, trees

Painting Edges

binary search, data structures

Mischievous Shooter

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

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Acyclic Organic Compounds

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

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Developing Game

data structures

Strange Function

binary search, data structures, dp, greedy

Mice and Holes

data structures, dp, greedy, sortings

Middle Duplication

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

Little Elephant and Strings

data structures, implementation, string suffix structures, two pointers

Three Days Grace

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

Animals and Puzzle

binary search, data structures

King Kog's Reception

data structures

Good Subsegments

data structures

Koala and Notebook

data structures, dfs and similar, graphs, shortest paths, strings, trees