Sorting Books

data structures, dp, greedy

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

Fence Painting

brute force, constructive algorithms, greedy

School Clubs

dp, fft, math, number theory, probabilities

Odd Mineral Resource

binary search, bitmasks, brute force, data structures, probabilities, trees

Continuous City

bitmasks, constructive algorithms

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

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 Chocolate Bars

combinatorics, fft, math, probabilities

Nezzar and Tournaments

data structures, greedy

Nezzar and Hidden Permutations

constructive algorithms, dfs and similar, graphs

Nezzar and Nice Beatmap

constructive algorithms, geometry, greedy, math, sortings

Nezzar and Binary String

data structures, greedy

Nezzar and Board

constructive algorithms, math, number theory

Minimum Difference

data structures, hashing, sortings, two pointers

Lanterns

binary search, data structures, dp

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Journey

dfs and similar, dp, dsu, implementation

Longest Simple Cycle

dp, graphs, greedy

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

1 2 3 4 ...

dp, math, matrices

What Is It?

constructive algorithms, greedy

Cleaning

data structures, dp, greedy, math

Array Destruction

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

Tiles

combinatorics, dp, fft, math

Strange Set

flows, math

Minimum Path

graphs, shortest paths

Program

data structures, dp, implementation, strings

Moving to the Capital

dfs and similar, dp, graphs, shortest paths

New Year's Puzzle

brute force, dp, graph matchings, greedy, sortings

Correct Placement

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

Strange Covering

divide and conquer

Strange Permutation

binary search, combinatorics, data structures, dp, graphs, implementation, two pointers

Strange Housing

constructive algorithms, dfs and similar, graph matchings, graphs, greedy

Strange Shuffle

binary search, brute force, constructive algorithms, interactive

Strange Definition

bitmasks, graphs, hashing, math, number theory

Power Sockets

binary search, data structures, greedy

A Bit Similar

bitmasks, brute force, hashing, string suffix structures, strings, two pointers

Ceil Divisions

brute force, constructive algorithms, math, number theory

Building a Fence

dp, greedy, implementation, two pointers

Similar Sets

data structures, graphs, implementation

Prime Divisors Selection

binary search, greedy, math, number theory

The Robot

brute force, implementation

Road Reform

dsu, graphs, greedy

Plane Tiling

geometry, implementation, math

K and Medians

constructive algorithms, greedy, math

Hobbits

binary search, geometry

Full Turn

geometry, hashing, number theory

Firecrackers

binary search, sortings

Bakery

data structures, dsu

LaIS

data structures, dp, greedy

Distinctive Roots in a Tree

data structures, dfs and similar, dp, trees

Sum of Paths

combinatorics, dp, math

Three Bags

constructive algorithms, greedy

Hills And Valleys

brute force, implementation

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Finding satisfactory solutions

combinatorics, dp, graphs, greedy, math

Song of the Sirens

combinatorics, divide and conquer, hashing, math, string suffix structures, strings

Euclid's nightmare

bitmasks, dfs and similar, dsu, graphs, greedy, math, sortings

Apollo versus Pan

bitmasks, brute force, math

My Beautiful Madness

data structures, trees

Max Correct Set

bitmasks, dp, math

Plan of Lectures

constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees

Pairs

binary search, constructive algorithms, greedy, two pointers

Busy Robot

implementation

The Treasure of The Segments

binary search, data structures, greedy

Close Tuples (hard version)

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

Mathematical Expression

constructive algorithms, dp, greedy

Water Level

brute force, graphs, greedy, implementation, math

Divide and Summarize

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

Range Diameter Sum

data structures, trees

Nim Shortcuts

data structures, games

Flip and Reverse

data structures, graphs, greedy

Latin Square

math, matrices

Glass Half Spilled

dp

Row GCD

math, number theory

XOR-ranges

dp, greedy

Forbidden Value

data structures, dp

String and Operations

dp, greedy

Four Points

brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search

Sequence and Swaps

dp, greedy, sortings

Array Partition

binary search, data structures, greedy, two pointers

Number of Simple Paths

combinatorics, dfs and similar, graphs, trees

Even Harder

dp

Dog Snacks

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

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Triangles

greedy, implementation

Game On Tree

data structures, dfs and similar, greedy, trees

Divide Powers

constructive algorithms, greedy

Two Editorials

brute force, dp, greedy, sortings, two pointers

Radio Towers

combinatorics, dp, math

Nullify The Matrix

constructive algorithms, games

Bitwise Queries (Hard Version)

bitmasks, constructive algorithms, interactive, math

Bitwise Queries (Easy Version)

bitmasks, constructive algorithms, interactive, math

Circle Game

games, geometry, math