Maximum GCD Sum Queries

brute force, dp, implementation, number theory

Assembly via Remainders

constructive algorithms, number theory

Maximize?

brute force, math, number theory

Reverse Card (Hard Version)

brute force, math, number theory

Reverse Card (Easy Version)

brute force, math, number theory

Missing Subsequence Sum

bitmasks, constructive algorithms, greedy, number theory

Carousel of Combinations

brute force, combinatorics, dp, math, number theory

GCD on a grid

brute force, dfs and similar, dp, implementation, math, number theory

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Long Multiplication

greedy, math, number theory

Nearly Shortest Repeating Substring

brute force, implementation, number theory, strings

Product of Binary Decimals

brute force, dp, implementation, number theory

Girl Permutation

combinatorics, dp, math, number theory

GCD is Greater

brute force, data structures, math, number theory

Fireworks

math, number theory

Weird LCM Operations

brute force, constructive algorithms, number theory

Turtle Tenacity: Continual Mods

constructive algorithms, greedy, math, number theory, sortings

Turtle Fingers: Count the Values of k

brute force, implementation, math, number theory

Turtle Math: Fast Three Task

implementation, math, number theory

Moving Platforms

graphs, math, number theory, shortest paths

Final Countdown

implementation, math, number theory

Chaya Calendar

number theory

One-Dimensional Puzzle

combinatorics, math, number theory

Divisible Pairs

combinatorics, math, number theory

Modular Sequence

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

Physical Education Lesson

brute force, math, number theory

Vlad and an Odd Ordering

binary search, bitmasks, data structures, dp, implementation, math, number theory

A Balanced Problemset?

brute force, greedy, math, number theory

Partitioning the Array

brute force, math, number theory

Yet Another Inversions Problem

combinatorics, data structures, dp, implementation, math, number theory

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Two Divisors

constructive algorithms, math, number theory

2023

constructive algorithms, implementation, math, number theory

Multiple Lamps

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

Split Plus K

greedy, math, number theory

Make Almost Equal With Mod

bitmasks, constructive algorithms, math, number theory

Good Triples

brute force, combinatorics, number theory

Grid Game 2

games, number theory

Insert and Equalize

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

Small GCD

bitmasks, brute force, dp, math, number theory

Yarik and Musical Notes

hashing, math, number theory

250 Thousand Tons of TNT

brute force, implementation, number theory

Game with Integers

games, math, number theory

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

Cyclic Hamming (Easy Version)

brute force, divide and conquer, dp, fft, math, number theory

Counting Rhyme

dp, math, number theory

Two Permutations (Easy Version)

brute force, constructive algorithms, greedy, number theory

Divide and Equalize

math, number theory

Last Man Standing

brute force, data structures, number theory

Vasilije Loves Number Theory

brute force, math, number theory

Joyboard

math, number theory

Effects of Anti Pimples

combinatorics, number theory, sortings

Jellyfish and Green Apple

bitmasks, greedy, math, number theory

Non-coprime Split

math, number theory

Battling with Numbers

combinatorics, math, number theory

Divisor Chain

bitmasks, constructive algorithms, math, number theory

United We Stand

constructive algorithms, math, number theory

Yet Another Permutation Problem

constructive algorithms, greedy, math, number theory

The Walkway

brute force, dp, greedy, math, number theory

Longest Divisors Interval

brute force, combinatorics, greedy, math, number theory

Ntarsis' Set

binary search, math, number theory

We Were Both Children

brute force, implementation, math, number theory

Vika and Stone Skipping

brute force, implementation, math, number theory

Vika and Price Tags

math, number theory

Swimmers in the Pool

dp, fft, math, number theory

Forbidden Integer

constructive algorithms, implementation, math, number theory

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees

Row Major

constructive algorithms, greedy, math, number theory, strings

No Prime Differences

constructive algorithms, math, number theory

Doctor's Brown Hypothesis

dfs and similar, graphs, math, number theory

MEX of LCM

binary search, data structures, implementation, math, number theory

Hyperregular Bracket Strings

combinatorics, greedy, hashing, math, number theory, sortings

Permutation Swap

math, number theory

Dreaming of Freedom

greedy, math, number theory

Lunatic Never Content

math, number theory

Strongly Composite

greedy, math, number theory

Magic Triples (Hard Version)

brute force, data structures, math, number theory

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Ian Visits Mary

constructive algorithms, geometry, number theory

Bosco and Particle

dp, math, number theory, strings

Factorization

*special problem, number theory

Trivial Conjecture

*special problem, constructive algorithms, math, number theory

Living Sequence

binary search, dp, math, number theory

Candies

constructive algorithms, math, number theory

GCD Master (easy version)

greedy, math, number theory, sortings

Pull Your Luck

brute force, greedy, math, number theory

Another n-dimensional chocolate bar

dp, math, meet-in-the-middle, number theory

Gifts from Grandfather Ahmed

dp, math, number theory

Candy Store

greedy, math, number theory

Li Hua and Array

brute force, data structures, dsu, math, number theory, two pointers

Strange Triples

brute force, math, number theory

Counting Factorizations

combinatorics, divide and conquer, dp, math, number theory

Divisors and Table

brute force, dfs and similar, dp, number theory

Serval and Music Game

brute force, dp, implementation, math, number theory

Serval and Mocha's Array

brute force, math, number theory

Number Factorization

greedy, math, number theory

Game of the Year

brute force, data structures, math, number theory

Many Perfect Squares

brute force, math, number theory

Delicious Dessert

binary search, dsu, hashing, math, number theory, string suffix structures

Three Chairs

bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings