Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

Restore Modulo

implementation, math

Fence Painting

brute force, constructive algorithms, greedy

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Searching Local Minimum

binary search, interactive, ternary search

Nezzar and Symmetric Array

implementation, math, sortings

Nezzar and Binary String

data structures, greedy

Nezzar and Board

constructive algorithms, math, number theory

Journey

dfs and similar, dp, dsu, implementation

Longest Simple Cycle

dp, graphs, greedy

Inflation

binary search, brute force, greedy, math

Strange Beauty

dp, math, number theory, sortings

Unusual Matrix

2-sat, brute force, constructive algorithms

Advertising Agency

combinatorics, math, sortings

Cleaning the Phone

binary search, dp, sortings, two pointers

Ball in Berland

combinatorics, graphs, math

Array Destruction

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

Program

data structures, dp, implementation, strings

No More Inversions

constructive algorithms, math

Correct Placement

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

Strange Definition

bitmasks, graphs, hashing, math, number theory

Strange Birthday Party

binary search, dp, greedy, sortings, two pointers

Ceil Divisions

brute force, constructive algorithms, math, number theory

Building a Fence

dp, greedy, implementation, two pointers

The Robot

brute force, implementation

Road Reform

dsu, graphs, greedy

Full Turn

geometry, hashing, number theory

Firecrackers

binary search, sortings

Berpizza

data structures, implementation

Three Bags

constructive algorithms, greedy

Hills And Valleys

brute force, implementation

Apollo versus Pan

bitmasks, brute force, math

13th Labour of Heracles

data structures, greedy, sortings, trees

Canine poetry

dp, greedy, strings

Pairs

binary search, constructive algorithms, greedy, two pointers

Busy Robot

implementation

Find The Array

bitmasks, constructive algorithms, greedy

The Treasure of The Segments

binary search, data structures, greedy

Close Tuples (hard version)

binary search, combinatorics, implementation, math, sortings, two pointers

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

Add to Neighbour and Remove

greedy, math, number theory

Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Random Events

dp, math, probabilities

Find the Spruce

brute force, dp, implementation

Move and Turn

dp, math

Row GCD

math, number theory

Sequence and Swaps

dp, greedy, sortings

Number into Sequence

constructive algorithms, math, number theory

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Triangles

greedy, implementation

Suffix Operations

constructive algorithms, implementation

Radio Towers

combinatorics, dp, math

Toy Blocks

binary search, greedy, math, sortings

Circle Game

games, geometry, math

String Equality

dp, greedy, hashing, implementation, strings

Rating Compression

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

Catching Cheaters

dp, strings

Knapsack

constructive algorithms, greedy, sortings

Divide and Sum

combinatorics, math, sortings

Division

brute force, math, number theory

The Delivery Dilemma

binary search, greedy, sortings

Saving the City

dp, greedy, math, sortings

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Extreme Subtraction

constructive algorithms, dp, greedy

Binary Table (Hard Version)

constructive algorithms, graphs, greedy, implementation

Binary Table (Easy Version)

constructive algorithms, implementation

Minimal Height Tree

graphs, greedy, shortest paths, trees

Chef Monocarp

dp, flows, graph matchings, greedy, math, sortings

Bandit in a City

binary search, dfs and similar, graphs, greedy, trees

Binary Search

binary search, combinatorics

Two Round Dances

combinatorics, math

Used Markers

*special problem, greedy

Black Friday

*special problem, implementation

Polycarp and the Language of Gods

*special problem, implementation, two pointers

String Reversal

data structures, greedy, strings

String Deletion

binary search, data structures, greedy, two pointers

Bouncing Boomerangs

constructive algorithms, greedy, implementation

Chess Cheater

greedy, implementation, sortings

Rock, Paper, Scissors

brute force, constructive algorithms, flows, greedy, math

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Huge Boxes of Animal Toys

constructive algorithms

Flamingoes of Mystery

interactive

Arena of Greed

games, greedy

Years

data structures, sortings

Lonely Numbers

binary search, math, number theory, two pointers

Valuable Paper

binary search, flows, graph matchings, graphs

Bargain

combinatorics, dp, math

Nice Matrix

greedy, implementation, math

Hexagons

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

Palindromifier

constructive algorithms, strings

Rescue Nibel!

combinatorics, data structures, sortings

Pokémon Army (easy version)

constructive algorithms, dp, greedy

Sage's Birthday (hard version)

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

Killjoy

greedy, implementation, math

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

Negative Prefixes

greedy, sortings

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Bouncing Ball

brute force, dp, implementation

Shurikens

data structures, greedy, implementation

Perform Easily

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