Cat, Fox and Double Maximum

constructive algorithms, greedy, implementation, math, sortings

Arithmancy (Medium)

constructive algorithms, interactive, probabilities, strings

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Exact Neighbours (Hard)

constructive algorithms

Exact Neighbours (Medium)

constructive algorithms

Exact Neighbours (Easy)

constructive algorithms

Balanced Unshuffle (Hard)

constructive algorithms, trees

Balanced Unshuffle (Medium)

brute force, constructive algorithms, trees

Shifts and Sorting

constructive algorithms, greedy

Two Friends

constructive algorithms, implementation, math

Cells Arrangement

constructive algorithms

Assembly via Remainders

constructive algorithms, number theory

Rectangle Filling

constructive algorithms, implementation

Card Exchange

constructive algorithms, games, greedy

Connected Cubes

constructive algorithms, games

Missing Subarray Sum

constructive algorithms

Folding Strip

constructive algorithms, greedy, strings

Missing Subsequence Sum

bitmasks, constructive algorithms, greedy, number theory

Yet Another Permutation Constructive

*special problem, constructive algorithms

A BIT of a Construction

bitmasks, constructive algorithms, greedy, implementation

Stickogon

constructive algorithms, greedy

Nene and the Passing Game

constructive algorithms, data structures, dsu, graphs, sortings

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

Nene's Magical Matrix

constructive algorithms, greedy, math

The Most Reckless Defense

bitmasks, brute force, constructive algorithms, dp, flows, graph matchings, shortest paths

Progressive Square

constructive algorithms, data structures, implementation, sortings

Painting the Ribbon

constructive algorithms, greedy, math

Help, what does it mean to be "Based"

brute force, constructive algorithms, expression parsing, implementation, sortings

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Inversion Composition

constructive algorithms, data structures, greedy

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Buying Jewels

constructive algorithms, greedy, math

Dual Trigger

constructive algorithms, greedy, math

Make Triangle

constructive algorithms, math

Funny or Scary?

constructive algorithms

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

Arrow Path

brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths

Special Characters

brute force, constructive algorithms

Birthday Gift

bitmasks, brute force, constructive algorithms, greedy, implementation

Cook and Porridge

binary search, constructive algorithms, data structures, implementation

Binary Search

binary search, constructive algorithms, greedy

Equal XOR

bitmasks, constructive algorithms

Tree Compass

constructive algorithms, dfs and similar, greedy, trees

Bessie and MEX

constructive algorithms, math

Farmer John's Challenge

constructive algorithms, math

Rudolf and Subway

constructive algorithms, dfs and similar, graphs, shortest paths

Almost Certainly

*special problem, constructive algorithms, data structures, sortings

Three Arrays

*special problem, constructive algorithms, implementation, sortings

Parallel Universes

*special problem, constructive algorithms, dfs and similar, dsu, graphs

Evidence Board

*special problem, constructive algorithms, dfs and similar, graphs, trees

Draw Polygon Lines

*special problem, constructive algorithms, dp, geometry, interactive

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

Informatics in MAC

constructive algorithms

Entertainment in MAC

constructive algorithms, strings

Weird LCM Operations

brute force, constructive algorithms, number theory

XOR Break --- Solo Version

bitmasks, constructive algorithms, greedy

Find a Mine

binary search, constructive algorithms, geometry, greedy, interactive, math

Turtle Magic: Royal Turtle Shell Pattern

bitmasks, brute force, combinatorics, constructive algorithms, dfs and similar, math

Turtle Tenacity: Continual Mods

constructive algorithms, greedy, math, number theory, sortings

Interactive Mex Tree

constructive algorithms, dfs and similar, interactive, trees

Lexicographically Largest

binary search, constructive algorithms, data structures, greedy, sortings

Permutation Printing

brute force, constructive algorithms, math

Sasha and the Casino

binary search, brute force, constructive algorithms, games, greedy, math

Sasha and the Drawing

constructive algorithms, greedy, math

Sasha and the Beautiful Array

constructive algorithms, greedy, math, sortings

Modular Sequence

brute force, constructive algorithms, dp, graphs, greedy, math, number theory

Klever Permutation

constructive algorithms, math, two pointers

Following the String

constructive algorithms, greedy, strings

We Got Everything Covered!

constructive algorithms, greedy, strings

Anti-Proxy Attendance

constructive algorithms, dp, interactive, ternary search

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

Slimes

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

Find B

constructive algorithms, greedy

Increasing Subsequences

bitmasks, constructive algorithms, divide and conquer, greedy, math

Forming Triangles

combinatorics, constructive algorithms, math, sortings

Tricky Template

constructive algorithms, implementation, strings

Tree LGM

constructive algorithms, divide and conquer, games, trees

Counting Prefixes

combinatorics, constructive algorithms, dp, implementation, math

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Permutation of Given

constructive algorithms, math

ace5 and Task Order

constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings

Minimize Inversions

constructive algorithms, data structures, greedy, implementation, sortings

Brick Wall

constructive algorithms, greedy, implementation, math

Construct Tree

bitmasks, constructive algorithms, dp, trees

Construct Matrix

constructive algorithms, math

Least Product

constructive algorithms, math

Group Division

constructive algorithms, dfs and similar, graphs, greedy

Mathematical Problem

brute force, constructive algorithms, geometry, math

Training Before the Olympiad

constructive algorithms, games, greedy, implementation, math

Two Divisors

constructive algorithms, math, number theory

2023

constructive algorithms, implementation, math, number theory

Preparing for the Contest

constructive algorithms, math

Evaluate It and Back Again

constructive algorithms, implementation, math

Cactus Transformation

constructive algorithms

Parallel Swaps Sort

constructive algorithms, data structures

Multiple Lamps

bitmasks, brute force, constructive algorithms, math, number theory

Heavy Intervals

constructive algorithms, data structures, dsu, greedy, math, sortings

Make Almost Equal With Mod

bitmasks, constructive algorithms, math, number theory