Minimum Ties

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math

Guessing the Greatest (easy version)

binary search, interactive

Eastern Exhibition

binary search, geometry, shortest paths, sortings

Floor and Mod

binary search, brute force, math, number theory

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

Restore Modulo

implementation, math

Fence Painting

brute force, constructive algorithms, greedy

Searching Local Minimum

binary search, interactive, ternary search

Nezzar and Symmetric Array

implementation, math, sortings

Journey

dfs and similar, dp, dsu, implementation

Longest Simple Cycle

dp, graphs, greedy

Inflation

binary search, brute force, greedy, math

Advertising Agency

combinatorics, math, sortings

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 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

Full Turn

geometry, hashing, number theory

Firecrackers

binary search, sortings

Berpizza

data structures, implementation

Hills And Valleys

brute force, implementation

13th Labour of Heracles

data structures, greedy, sortings, trees

Canine poetry

dp, greedy, strings

Find The Array

bitmasks, constructive algorithms, 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

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

Knapsack

constructive algorithms, greedy, sortings

Division

brute force, math, number theory

The Delivery Dilemma

binary search, greedy, sortings

Saving the City

dp, greedy, math, sortings

Binary Table (Easy Version)

constructive algorithms, implementation

Minimal Height Tree

graphs, greedy, shortest paths, 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 Deletion

binary search, data structures, greedy, two pointers

Chess Cheater

greedy, implementation, sortings

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

Bargain

combinatorics, dp, math

Nice Matrix

greedy, implementation, math

Palindromifier

constructive algorithms, strings

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

Peaceful Rooks

dfs and similar, dsu, graphs

Decrease the Sum of Digits

greedy, math

Discrete Acceleration

binary search, dp, implementation, math, two pointers

Arrays Sum

constructive algorithms, greedy, math

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Big Vova

brute force, greedy, math, number theory

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Balanced Bitstring

implementation, strings

Mere Array

constructive algorithms, math, number theory, sortings

Binary String Reconstruction

2-sat, brute force, constructive algorithms, greedy

RPG Protagonist

brute force, greedy, math

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Good Subarrays

data structures, dp, math

Power Sequence

brute force, math, number theory, sortings

Multiples of Length

constructive algorithms, greedy, number theory

Boboniu and Bit Operations

bitmasks, brute force, dp, greedy

Pinkie Pie Eats Patty-cakes

constructive algorithms, greedy, math, sortings

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Omkar and Bed Wars

dp, greedy

Cyclic Permutations

combinatorics, dp, graphs, math

Good String

brute force, dp, greedy, two pointers

Array Walk

brute force, dp, greedy

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Prefix Flip (Hard Version)

constructive algorithms, data structures, implementation, strings, two pointers