The Elder Trolls IV: Oblivon

greedy, math

Wallpaper

implementation, math

Repaintings

math

Table

*special problem, greedy, implementation, math

Lamps in a Line

*special problem, math

Mixing Water

binary search, math

Another Problem About Dividing Numbers

constructive algorithms, math, number theory

Little Girl and Maximum XOR

bitmasks, dp, greedy, implementation, math

Cobb

bitmasks, brute force, greedy, math

Deleting Divisors

games, math, number theory

Baby Ehab Partitions Again

bitmasks, constructive algorithms, dp, math

Soldier and Number Game

constructive algorithms, dp, math, number theory

AND, OR and square sum

bitmasks, greedy, math

Xenia and Colorful Gems

binary search, greedy, math, sortings, two pointers

RPG Protagonist

brute force, greedy, math

Monsters And Spells

binary search, data structures, dp, greedy, implementation, math, two pointers

Pinkie Pie Eats Patty-cakes

constructive algorithms, greedy, math, sortings

Floor and Mod

binary search, brute force, math, number theory

Long Legs

brute force, math

Vasya and Chess

constructive algorithms, games, math

Nezzar and Symmetric Array

implementation, math, sortings

The Third Problem

combinatorics, constructive algorithms, math

Bear and Prime Numbers

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

Circle Game

games, geometry, math

Close Tuples (hard version)

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

Ceil Divisions

brute force, constructive algorithms, math, number theory

Shinju and the Lost Permutation

constructive algorithms, math

Infinite Prefixes

math, strings

Ayoub's function

binary search, combinatorics, greedy, math, strings

Even Subarrays

bitmasks, brute force, hashing, math, number theory

Water the Trees

binary search, greedy, math

Count the Arrays

combinatorics, math

Hacking Cypher

brute force, math, number theory, strings

Pipeline

binary search, math

White Sheet

geometry, math

MEX and Increments

constructive algorithms, data structures, dp, greedy, implementation, math, sortings

Primes and Multiplication

math, number theory

Kavi on Pairing Duty

combinatorics, dp, math

Training Session

combinatorics, data structures, geometry, implementation, math

Multiplicity

data structures, dp, implementation, math, number theory

Monoblock

combinatorics, data structures, implementation, math

Moamen and XOR

bitmasks, combinatorics, dp, math, matrices

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Rorororobot

binary search, data structures, greedy, math

Bargain

combinatorics, dp, math

Square-Free Division (easy version)

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

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Mathematical Problem

brute force, constructive algorithms, geometry, math

Walk on Matrix

bitmasks, constructive algorithms, math

Infinite Fence

greedy, math, number theory

Quiz Master

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

Short Task

brute force, dp, math, number theory

Candy Store

greedy, math, number theory

k-th equality

brute force, implementation, math

RPD and Rap Sheet (Easy Version)

bitmasks, constructive algorithms, interactive, math

Trailing Loves (or L'oeufs?)

brute force, implementation, math, number theory

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Don't Blame Me

bitmasks, combinatorics, dp, math

Climbing the Tree

binary search, math

Gambling

data structures, dp, greedy, math

Ivan the Fool and the Probability Theory

combinatorics, dp, math

Promising String (easy version)

brute force, implementation, math, strings

Cross Coloring

data structures, implementation, math

Singers' Tour

constructive algorithms, math

Domino (easy version)

constructive algorithms, math

Shifting String

graphs, math, number theory, strings

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Hidden Permutations

dfs and similar, interactive, math

Ilya and Escalator

combinatorics, dp, math, probabilities

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math

New Year and the Permutation Concatenation

combinatorics, dp, math

Superhero Battle

math

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Candy Party (Easy Version)

bitmasks, constructive algorithms, graphs, greedy, implementation, math

Different Rules

constructive algorithms, greedy, implementation, math

Extra Element

implementation, math

Dreamoon Likes Sequences

bitmasks, combinatorics, math

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

1-2-K Game

games, math

Parking Lot

combinatorics, math

Yet Another Monster Fight

binary search, dp, greedy, implementation, math

Two Hundred Twenty One (easy version)

data structures, dp, math

Average Superhero Gang Power

brute force, implementation, math

Relatively Prime Graph

brute force, constructive algorithms, graphs, greedy, math

Creative Snap

binary search, brute force, divide and conquer, math

Find a Mine

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

The Meaningless Game

math, number theory

Binary Numbers AND Sum

data structures, implementation, math

Ticket Game

games, greedy, math

Santa's Bot

combinatorics, math, probabilities

Fixed Prefix Permutations

binary search, bitmasks, data structures, hashing, math, sortings

Bessie's Birthday Cake (Hard Version)

geometry, greedy, math

Up the Strip (simplified version)

brute force, data structures, dp, math, number theory

Guest From the Past

implementation, math

Swaps in Permutation

dfs and similar, dsu, math

Meta-set

brute force, combinatorics, data structures, hashing, math

Wet Shark and Flowers

combinatorics, math, number theory, probabilities

Ones and Twos

binary search, data structures, divide and conquer, math, two pointers