Prison Break

binary search, games, geometry, ternary search

One Billion Shades of Grey

flows, graphs

Boring Card Game

data structures, greedy, trees

Xum

bitmasks, constructive algorithms, math, matrices, number theory

Unshuffling a Deck

constructive algorithms, implementation

The Hard Work of Paparazzi

dp

Chess Cheater

greedy, implementation, sortings

Avoiding Zero

math, sortings

Number of Subsequences

combinatorics, dp, strings

Rock, Paper, Scissors

brute force, constructive algorithms, flows, greedy, math

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Increase and Copy

binary search, constructive algorithms, math

Symmetric Matrix

implementation

Floor Number

implementation, math

Impressive Harvesting of The Orchard

data structures

Huge Boxes of Animal Toys

constructive algorithms

Flamingoes of Mystery

interactive

Excitation of Atoms

greedy, implementation

Danger of Mad Snakes

combinatorics, dp, math

Captain of Knights

math

Blue and Red of Our Faculty!

divide and conquer, dp

Arena of Greed

games, greedy

Ancient Language

graphs, sortings

Years

data structures, 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

Nice Matrix

greedy, implementation, math

Fence

geometry, math

Swedish Heroes

brute force, dp, implementation

Hexagons

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

Palindromifier

constructive algorithms, strings

Putting Bricks in the Wall

constructive algorithms, implementation

XORwice

bitmasks, greedy, math

Battle Lemmings

dp, greedy

Rescue Nibel!

combinatorics, data structures, sortings

Pokémon Army (hard version)

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

Pokémon Army (easy version)

constructive algorithms, dp, greedy

Rock and Lever

bitmasks, math

Cubes Sorting

math, sortings

Rain of Fire

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

Decryption

constructive algorithms, implementation, math, number theory

Sage's Birthday (hard version)

binary search, brute force, constructive algorithms, greedy, sortings, two pointers

Sage's Birthday (easy version)

binary search, constructive algorithms, greedy, sortings

Killjoy

greedy, implementation, math

Stairs

brute force, constructive algorithms, greedy, implementation, math

Digit Game

games, greedy, implementation

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

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

Negative Prefixes

greedy, sortings

Buying Torches

math

Two Arrays

greedy, math, sortings

Copy-paste

greedy, math

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

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Cakes for Clones

dp

New Game Plus!

constructive algorithms, greedy, math

XOR-gun

bitmasks, brute force, constructive algorithms

Bouncing Ball

brute force, dp, implementation

Repainting Street

brute force, brute force, greedy

Prison Break

brute force, math

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

A New Technique

implementation

Finding Sasuke

constructive algorithms, math

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

Fair Numbers

brute force, number theory

In-game Chat

implementation

Subsequences of Length Two

dp, strings

Two Platforms

binary search, dp, sortings, two pointers

Decrease the Sum of Digits

greedy, math

Yet Another Array Restoration

brute force, math, number theory