Incinerate

binary search, brute force, data structures, implementation, math, sortings

Binary Strings are Fun

combinatorics, math

Make Array Good

constructive algorithms, implementation, number theory, sortings

Set Construction

constructive algorithms, dfs and similar, graphs, greedy

Quests

binary search, greedy, sortings

Binary Inversions

data structures, greedy, math

The Humanoid

brute force, dp, sortings

Make It Round

brute force, number theory

Thermostat

greedy, math, shortest paths

Almost All Multiples

greedy, number theory

Make Nonzero Sum (hard version)

constructive algorithms, dp, greedy

Make Nonzero Sum (easy version)

constructive algorithms, dp, greedy

Complementary XOR

constructive algorithms, implementation

Number Game

binary search, data structures, games, greedy, implementation

Diverse Substrings

brute force, implementation, strings

Swap Game

games

Permutation Operations

constructive algorithms, greedy, implementation, math

Divisible Numbers (easy version)

brute force, math, number theory

Divisibility by 2^n

greedy, math, sortings

Save the Magazines

constructive algorithms, dp, greedy

Orray

bitmasks, brute force, greedy, math, sortings

Smaller

constructive algorithms, greedy, strings

Scuza

binary search, greedy, math

Coprime

brute force, greedy, number theory

Masha and a Beautiful Tree

dfs and similar, divide and conquer, graphs, sortings, trees

Minimize the Thickness

brute force, greedy, math, two pointers

Knowledge Cards

constructive algorithms, data structures

Bricks and Bags

constructive algorithms, games, greedy, sortings

Card Game

combinatorics, constructive algorithms, dp, games

Array Recovery

constructive algorithms, greedy, math

Even Number Addicts

dp, games, greedy, math

Prefix Sum Addicts

constructive algorithms, greedy, math, sortings

Ela and Crickets

constructive algorithms, games, implementation, math

Ela's Fitness and the Luxury Number

binary search, implementation, math

Good Subarrays (Easy Version)

binary search, data structures, schedules, two pointers

Playing with GCD

math, number theory

Phase Shift

dfs and similar, dsu, graphs, greedy, implementation, strings

Removing Smallest Multiples

greedy, math

Zero-One (Easy Version)

constructive algorithms, greedy, math

Parity Shuffle Sorting

constructive algorithms, sortings

Balance (Easy version)

brute force, data structures, implementation, number theory

Kill Demodogs

greedy, math

Minimum Notation

data structures, greedy, math, sortings

Friends and the Restaurant

greedy, sortings, two pointers

Jumping on Tiles

constructive algorithms, strings

Digital Logarithm

data structures, greedy, sortings

Jatayu's Balanced Bracket Sequence

data structures, dsu, graphs, greedy

Mainak and Interesting Sequence

bitmasks, constructive algorithms, math

Garage

binary search, geometry, math

Even-Odd XOR

bitmasks, constructive algorithms, greedy

Line

greedy, sortings

Min-Max Array Transformation

binary search, greedy, two pointers

Corners

greedy, implementation

Fighting Tournament

binary search, data structures, implementation, two pointers

Madoka and Formal Statement

greedy

Madoka and Underground Competitions

constructive algorithms, implementation

Add Modulo 10

brute force, math, number theory

Build Permutation

constructive algorithms, dp, math

Sort Zero

greedy, sortings

Party

brute force, graphs

Color the Picture

constructive algorithms, greedy, math

Difference of GCDs

constructive algorithms, math

Qpwoeirut And The City

dp, flows, greedy, implementation

Making Towers

dp, greedy, math

Mark and His Unfinished Essay

brute force, implementation

Virus

greedy, implementation, sortings

Yet Another Problem About Pairs Satisfying an Inequality

binary search, data structures, dp, greedy, sortings

Mirror Grid

implementation

Double Strings

brute force, data structures, strings

Train and Queries

data structures, greedy

Schedule Management

binary search, greedy, implementation, two pointers

Palindromic Numbers

constructive algorithms, implementation, math

3SUM Closure

brute force, data structures

awoo's Favorite Problem

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

Fishingprince Plays With Array

constructive algorithms, greedy, implementation, math

Paranoid String

constructive algorithms, greedy

Directional Increase

greedy

2^Sort

data structures, dp, sortings, two pointers

3SUM

brute force, math

Binary Deque

binary search, implementation, two pointers

The Clock

brute force, implementation

Sum of Substrings

brute force, constructive algorithms, greedy, math, strings

Price Maximization

binary search, greedy, math, two pointers

Circular Local MiniMax

constructive algorithms, greedy, sortings

Column Swapping

brute force, constructive algorithms, greedy, implementation, sortings

LIS or Reverse LIS?

constructive algorithms, greedy, implementation, math

AND Sorting

bitmasks, constructive algorithms, sortings

Double Sort

implementation, sortings

Rooks Defenders

data structures, implementation

Stone Age Problem

data structures, implementation

Maximum Crossings (Hard Version)

data structures, divide and conquer, sortings

Maximum Crossings (Easy Version)

brute force

White-Black Balanced Subtrees

dfs and similar, dp, graphs, trees

Longest Strike

data structures, greedy, implementation, sortings, two pointers

Eating Queries

binary search, greedy, sortings

Replace With the Previous, Minimize

dsu, greedy, strings

Vertical Paths

graphs, implementation, trees

Detective Task

implementation

A-B-C Sort

constructive algorithms, implementation, sortings

Palindrome Basis

brute force, dp, math, number theory