Game with Cards

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

Financiers Game

dp

Unique Array

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

Fence Divercity

combinatorics, dp, number theory

Maximum Matching

bitmasks, brute force, dfs and similar, dp, graphs

Wooden Spoon

combinatorics, dp

Greedy Subsequences

data structures, dp, trees

Famil Door and Roads

combinatorics, data structures, dfs and similar, dp, probabilities, trees

Crossword Expert

combinatorics, dp, number theory, probabilities, two pointers

Game with Powers

dp, games

Vasya and Array

dp

Bacterial Melee

brute force, combinatorics, dp, string suffix structures

Cats on the Upgrade (easy version)

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

Independent Set

dfs and similar, dp, trees

Runner's Problem

dp, matrices, sortings

Beavermuncher-0xFF

dfs and similar, dp, dsu, greedy, trees

Maximum Element

combinatorics, dp, math

Summoning Minions

constructive algorithms, dp, flows, graph matchings, greedy, sortings

Bulbo

dp, greedy

Bath Queue

combinatorics, dp, probabilities

Vasya and Maximum Profit

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

2..3...4.... Wonderful! Wonderful!

combinatorics, dp, math

Hiking

binary search, dp

Roads in the Kingdom

dfs and similar, dp, graphs, trees

Bags with Balls

combinatorics, dp, math, number theory

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Sonya and Ice Cream

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

Hongcow Buys a Deck of Cards

bitmasks, brute force, dp

Carousel of Combinations

brute force, combinatorics, dp, math, number theory

Labeling the Tree with Distances

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

Axel and Marston in Bitland

bitmasks, dp, graphs, matrices

Swap and Maximum Block

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

Gojou and Matrix Game

data structures, dp, games, hashing, implementation, math, number theory, sortings

World Eater Brothers

dfs and similar, dp, greedy, trees

TV Game

dp

Maximum Questions

data structures, dp, strings

The Most Reckless Defense

bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths

Nauuo and Pictures (easy version)

dp, probabilities

Little Artem and Random Variable

dp, implementation, math, probabilities

Bracket Substring

dp, strings

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

Transmitting Levels

dp, implementation

Text Editor

brute force, dp, greedy, strings

Traffic Jams in the Land

data structures, dp, number theory

Levko and Strings

combinatorics, dp

Beautiful Pairs of Numbers

combinatorics, dp

Controversial Rounds

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

Jellyfish and Math

bitmasks, brute force, dfs and similar, dp, graphs, shortest paths

Travel Plan

combinatorics, dp, implementation, math, trees

Leaf Partition

dp, trees

Valera and Fools

dfs and similar, dp, graphs, shortest paths

Typical Party in Dorm

bitmasks, combinatorics, dp, strings

Abbreviation

dp, hashing, strings

Bear and Company

dp

Captains Mode

bitmasks, dp, games

Hyakugoku and Ladders

dp, probabilities, shortest paths

Fancy Stack

combinatorics, dp, implementation

Alice the Fan

dp

Cow and Treats

binary search, combinatorics, dp, greedy, implementation, math

String Multiplication

dp, greedy, strings

Strange Function

binary search, data structures, dp, greedy

Mischievous Shooter

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

Decomposition

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

Coloring

brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math

Up and Down the Tree

dfs and similar, dp, trees

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Top Secret Task

dp

Name That Tune

dp, probabilities, two pointers

Non-equal Neighbours

combinatorics, dp, math

Free Market

dp, greedy

Museums Tour

dp, graphs, implementation

Decreasing Game

constructive algorithms, dfs and similar, dp, greedy, interactive

Happy New Year

bitmasks, dp, implementation

Replace on Segment

dp, graph matchings

Cleaning Robot

bitmasks, dp

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Party

bitmasks, brute force, dp, graphs

Doremy's Number Line

dp, greedy, sortings

Abnormal Permutation Pairs (easy version)

combinatorics, dp, fft, math

Vulnerable Kerbals

constructive algorithms, dp, graphs, math, number theory

Tokitsukaze and Permutations

dp, math

Digital Wallet

dp, greedy

Removing Graph

brute force, dp, games, graphs, math

Optimal Polygon Perimeter

dp, geometry

Move and Swap

dfs and similar, dp, greedy, trees

Mysterious Code

dp, strings

Intellectual Inquiry

dp, greedy, strings

Xorcerer's Stones

bitmasks, constructive algorithms, dp, trees

Light Bulbs (Hard Version)

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

Coin Troubles

dp

Legen...

data structures, dp, matrices, strings

Good Subarrays (Hard Version)

binary search, data structures, dp, two pointers

Vittorio Plays with LEGO Bricks

dp, geometry

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Couple Cover

brute force, dp, number theory

Diameter Cuts

combinatorics, dfs and similar, dp, trees

Chain Chips

data structures, dp, matrices

Minibuses on Venus (easy version)

combinatorics, divide and conquer, dp

LuoTianyi and XOR-Tree

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

Expected diameter of a tree

binary search, brute force, dfs and similar, dp, sortings, trees