Enchanted Matrix

bitmasks, interactive, number theory

Visit of the Great

math, number theory

Levko and Sets

number theory

Lostborn

dp, math, number theory

Superhero's Job

dfs and similar, dp, hashing, math, number theory

GCD is Greater

brute force, data structures, math, number theory

Cutting Rectangle

brute force, math, number theory

Kuzya and Homework

data structures, number theory

Divisor Set

divide and conquer, fft, greedy, math, number theory

Mishka and Divisors

dp, number theory

Maximizing Root

dfs and similar, dp, graphs, math, number theory, trees

Billiard

geometry, number theory

Timofey and remoduling

brute force, implementation, math, number theory

Vika and Stone Skipping

brute force, implementation, math, number theory

Number Challenge

combinatorics, dp, implementation, math, number theory

Running Competition

bitmasks, fft, math, number theory

Guess Divisors Count

constructive algorithms, interactive, number theory

Xor-matic Number of the Graph

bitmasks, graphs, math, number theory, trees

Three Days Grace

data structures, dp, greedy, math, number theory, two pointers

You

dfs and similar, dp, math, number theory

Deleting Numbers

interactive, math, number theory

Cards

combinatorics, dp, math, number theory, probabilities

Ehab's REAL Number Theory Problem

brute force, dfs and similar, graphs, number theory, shortest paths

Painting Numbers

*special problem, data structures, greedy, number theory

Shaass and Painter Robot

brute force, implementation, number theory

Electrical Efficiency

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

Gifts from Grandfather Ahmed

dp, math, number theory

Power or XOR?

bitmasks, combinatorics, math, number theory

Cowslip Collections

combinatorics, math, number theory

Serval and Music Game

brute force, dp, implementation, math, number theory

Bags with Balls

combinatorics, dp, math, number theory

Gojou and Matrix Game

data structures, dp, games, hashing, implementation, math, number theory, sortings

Colored Balls

greedy, math, number theory

Two Arithmetic Progressions

math, number theory

LCM Sum (hard version)

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

Alex and a TV Show

bitmasks, combinatorics, number theory

Xum

bitmasks, constructive algorithms, math, matrices, number theory

Bash Plays with Functions

brute force, combinatorics, dp, number theory

Ehab and the Expected GCD Problem

combinatorics, dp, math, number theory

Genius

bitmasks, dp, graphs, number theory

REQ

data structures, number theory

Square-free division (hard version)

data structures, dp, greedy, math, number theory, two pointers

Make It One

bitmasks, combinatorics, dp, math, number theory, shortest paths

Jzzhu and Apples

constructive algorithms, number theory

Kuroni and the Punishment

math, number theory, probabilities

Beautiful numbers

dp, number theory

Morrowindows

math, number theory

Tractor College

implementation, math, number theory, ternary search

Space Isaac

hashing, number theory

Cows and Cool Sequences

dp, math, number theory

Cube Problem

brute force, math, number theory

Four Divisors

data structures, dp, math, number theory, sortings, two pointers

Divisibility

constructive algorithms, dp, greedy, number theory

Geometrical Progression

brute force, math, number theory

Delicious Dessert

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

Superior Periodic Subarrays

number theory

Numbers

dp, math, number theory

Anniversary

data structures, implementation, math, matrices, number theory

Minimum Modular

brute force, graphs, math, number theory

Pave the Parallelepiped

bitmasks, brute force, combinatorics, math, number theory

Lunar New Year and a Recursive Sequence

math, matrices, number theory

Alice, Bob, Oranges and Apples

number theory

Two Permutations (Easy Version)

brute force, constructive algorithms, greedy, number theory

Crossword Expert

combinatorics, dp, number theory, probabilities, two pointers

Array Equalizer

binary search, greedy, implementation, math, number theory, sortings, two pointers

Carousel of Combinations

brute force, combinatorics, dp, math, number theory

Notepad

number theory

Traffic Jams in the Land

data structures, dp, number theory

Multiple Lamps

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

Josuke and Complete Graph

binary search, brute force, data structures, math, number theory

Divisors and Table

brute force, dfs and similar, dp, number theory

Dominoes

combinatorics, fft, graphs, math, number theory

Relatively Prime Powers

combinatorics, math, number theory

Balance (Hard version)

brute force, data structures, number theory

Covered Points

fft, geometry, number theory

Cooperative Game

constructive algorithms, interactive, number theory

Prime Gift

binary search, dfs and similar, math, meet-in-the-middle, number theory, two pointers

Flipping Range

constructive algorithms, dp, greedy, number theory

Tonya and Burenka-179

data structures, greedy, math, number theory

Hyperregular Bracket Strings

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

Chopping Carrots (Hard Version)

brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers

GCD Counting

divide and conquer, dp, dsu, number theory, trees

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory

Fib-tree

brute force, dfs and similar, divide and conquer, number theory, trees

DZY Loves Fibonacci Numbers

data structures, math, number theory

Two IP Cameras

*special problem, math, number theory

Big Number and Remainder

*special problem, math, number theory

Divisibility Rules

math, number theory

Beautiful Set

brute force, number theory

Moving Platforms

graphs, math, number theory, shortest paths

Fence Divercity

combinatorics, dp, number theory

Barrels and boxes

brute force, combinatorics, math, number theory, probabilities

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Empire Strikes Back

binary search, math, number theory

Coprime Arrays

math, number theory

Bamboo Partition

brute force, data structures, implementation, math, number theory, sortings, two pointers

Vulnerable Kerbals

constructive algorithms, dp, graphs, math, number theory

Li Hua and Array

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

ZS and The Birthday Paradox

math, number theory, probabilities

Three Chairs

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