Ancient Language

graphs, sortings

BubbleSquare Tokens

Milutin's Plums

interactive

Light switches

meet-in-the-middle

Lonely Numbers

binary search, math, number theory, two pointers

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Lookup Tables

bitmasks

Virus

data structures, divide and conquer, dsu, graphs

Growing flowers

data structures

Coins

math

5G Antenna Towers

geometry

Does anyone else hate the wind?

Dušan's Railway

divide and conquer, graphs, trees

Valuable Paper

binary search, flows, graph matchings, graphs

Wakanda Forever

Boring Queries

data structures, math, number theory

Minlexes

dp, greedy, implementation, strings

Returning Home

graphs, shortest paths, sortings

Bargain

combinatorics, dp, math

Swedish Heroes

brute force, dp, implementation

Hexagons

brute force, constructive algorithms, greedy, implementation, math, shortest paths

Battle Lemmings

dp, greedy

Rescue Nibel!

combinatorics, data structures, sortings

Pokémon Army (hard version)

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

Rain of Fire

binary search, data structures, dfs and similar, dsu, graphs, implementation

Decryption

constructive algorithms, implementation, math, number theory

Three Occurrences

data structures, divide and conquer, hashing, two pointers

Equal Product

data structures, math, number theory, two pointers

Expected Damage

binary search, combinatorics, probabilities

Trash Problem

data structures, implementation

Showing Off

flows, graph matchings, greedy, implementation

Split

binary search, data structures, dp, greedy

Graph and Queries

data structures, dsu, graphs, implementation, trees

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Make Them Equal

constructive algorithms, greedy, math

Cakes for Clones

dp

New Game Plus!

constructive algorithms, greedy, math

XOR-gun

bitmasks, brute force, constructive algorithms

Roads and Ramen

data structures, trees

Solo mid Oracle

greedy, math, ternary search

Shurikens

data structures, greedy, implementation

Perform Easily

binary search, brute force, dp, implementation, sortings, two pointers

No Game No Life

bitmasks, games, math, matrices

The Thorny Path

greedy, math

Poman Numbers

bitmasks, greedy, math, strings

Grime Zoo

brute force, greedy, implementation, strings

Peaceful Rooks

dfs and similar, dsu, graphs

Subsequences of Length Two

dp, strings

Two Platforms

binary search, dp, sortings, two pointers

Bitwise Magic

dp, math

Rainbow Triples

binary search, data structures, flows, greedy

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Two Different

constructive algorithms, divide and conquer

Avoid Rainbow Cycles

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

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Egor in the Republic of Dagestan

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Discrete Centrifugal Jumps

data structures, dp, graphs

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Deleting Numbers

interactive, math, number theory

Three Sequences

constructive algorithms, data structures, greedy, math

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Bricks

flows, graph matchings, graphs

Game of Pairs

constructive algorithms, dfs and similar, interactive, math, number theory

Fixed Point Removal

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

Tree Tag

dfs and similar, dp, games, trees

Chess Rush

*special problem, combinatorics, dp, implementation, math

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Roads

*special problem, geometry, sortings

Fancy Fence

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

Reverse and Swap

binary search, bitmasks, data structures

Divide Square

data structures, geometry, implementation, sortings

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

x-prime Substrings

brute force, dfs and similar, dp, string suffix structures, strings

Clear the Multiset

data structures, divide and conquer, dp, greedy

Zigzags

brute force, combinatorics, data structures, math, two pointers

RPG Protagonist

brute force, greedy, math

Yet Another Segments Subset

data structures, dp, graphs, sortings

Weights Division (hard version)

binary search, dfs and similar, greedy, sortings, trees, two pointers

Weights Division (easy version)

data structures, dfs and similar, greedy, trees

Running Competition

bitmasks, fft, math, number theory

Controversial Rounds

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

Two Types of Spells

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

Colored Rectangles

dp, greedy, sortings

Good Subarrays

data structures, dp, math

Distance Matching

constructive algorithms, dfs and similar, trees

Rainbow Rectangles

data structures, sortings, two pointers

Monster Invaders

dp, greedy, implementation

Stoned Game

brute force, constructive algorithms, games, greedy

Multiples of Length

constructive algorithms, greedy, number theory

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Boboniu and Banknote Collection

strings

Boboniu and Jianghu

dp, greedy, sortings, trees

Boboniu and String

binary search, geometry, ternary search

Boboniu Walks on Graph

brute force, dfs and similar, graphs, hashing

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings