Beautiful Bracket Sequence (hard version)

combinatorics, probabilities

Beautiful Bracket Sequence (easy version)

combinatorics, dp, probabilities

Beautiful Mirrors with queries

data structures, probabilities

Tree Queries

data structures, probabilities, trees

Hyakugoku and Ladders

dp, probabilities, shortest paths

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Marek and Matching (hard version)

brute force, probabilities

Marek and Matching (easy version)

brute force, probabilities

GCD Groups 2

greedy, number theory, probabilities

Crossword Expert

combinatorics, dp, number theory, probabilities, two pointers

Tokitsukaze and Powers

number theory, probabilities

Expected Square Beauty

dp, math, probabilities

Nauuo and Pictures (hard version)

dp, probabilities

Nauuo and Pictures (easy version)

dp, probabilities

Card Bag

dp, math, probabilities

Serval and Bonus Problem

combinatorics, dp, math, probabilities

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Gold Experience

constructive algorithms, graphs, math, number theory, probabilities

Steps to One

dp, math, number theory, probabilities

Arithmetic Progression

binary search, interactive, number theory, probabilities

Makoto and a Blackboard

dp, math, number theory, probabilities

Inversion Expectation

dp, math, probabilities

The Top Scorer

combinatorics, dp, math, probabilities

Mergesort Strikes Back

math, probabilities

Computer Game

dp, greedy, math, probabilities

Lost Root

interactive, probabilities

Interstellar battle

math, probabilities, trees

Vasya and Magic Matrix

dp, math, probabilities

Subway Pursuit

binary search, interactive, probabilities

Intercity Travelling

combinatorics, math, probabilities

A Trance of Nightfall

dp, geometry, matrices, probabilities

Alternating Tree

combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees

I'm Feeling Lucky!

probabilities

Astronomy

geometry, probabilities

Fafa and Ancient Alphabet

math, probabilities

Game with String

implementation, probabilities, strings

Don't Exceed

math, probabilities

Strongly Connected Tournament

dp, graphs, math, probabilities

Fishes

data structures, graphs, greedy, probabilities, shortest paths

New Year and Arbitrary Arrangement

dp, math, probabilities

Willem, Chtholly and Seniorious

data structures, probabilities

Eyes Closed

data structures, probabilities

Something with XOR Queries

brute force, interactive, probabilities

Third Month Insanity

dp, probabilities, trees

Random Query

data structures, math, probabilities, two pointers

Interactive LowerBound

brute force, interactive, probabilities

Destiny

data structures, probabilities

Journey

dfs and similar, dp, graphs, probabilities, trees

Marmots (hard)

math, probabilities

Barrels and boxes

brute force, combinatorics, math, number theory, probabilities

Jon and Orbs

dp, math, probabilities

Inversions After Shuffle

data structures, probabilities

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Pokermon League challenge

math, probabilities

Dexterina’s Lab

games, matrices, probabilities

Memory and Casinos

data structures, math, probabilities

ZS and The Birthday Paradox

math, number theory, probabilities

LRU

bitmasks, dp, math, probabilities

Puzzles

dfs and similar, math, probabilities, trees

Bear and Chase

brute force, dfs and similar, graphs, implementation, math, probabilities

Another Sith Tournament

bitmasks, dp, math, probabilities

Gambling Nim

bitmasks, math, matrices, probabilities

Bear and Destroying Subtrees

dp, math, probabilities, trees

Little Artem and Random Variable

dp, implementation, math, probabilities

Startup Funding

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

Famil Door and Roads

combinatorics, data structures, dfs and similar, dp, probabilities, trees

Jerry's Protest

brute force, combinatorics, dp, probabilities

Birthday

greedy, math, probabilities

Wet Shark and Flowers

combinatorics, math, number theory, probabilities

Combining Slimes

dp, math, matrices, probabilities

Intergalaxy Trips

probabilities, shortest paths

Kleofáš and the n-thlon

dp, math, probabilities

Wilbur and Trees

dp, math, probabilities, sortings

Randomizer

combinatorics, geometry, probabilities

Kyoya and Train

dp, fft, graphs, math, probabilities

Bad Luck Island

dp, probabilities

Ilya and Escalator

combinatorics, dp, math, probabilities

Inversions problem

dp, probabilities

Second price auction

bitmasks, probabilities

Name That Tune

dp, probabilities, two pointers

Helping People

dp, probabilities

Game with Strings

bitmasks, dp, probabilities

Dreamoon and WiFi

bitmasks, brute force, combinatorics, dp, math, probabilities

World of Darkraft - 2

dp, probabilities

Bingo!

combinatorics, math, probabilities

Little Pony and Expected Maximum

probabilities

Magic Trick

combinatorics, math, probabilities

DZY Loves Games

math, matrices, probabilities

DZY Loves FFT

probabilities

Andrey and Problem

greedy, math, probabilities

Valera and Number

bitmasks, dp, math, probabilities

Colored Jenga

dfs and similar, dp, probabilities

Square Table

constructive algorithms, math, probabilities

Painting The Wall

dp, probabilities

Ghd

brute force, math, probabilities

Jeff and Furik

combinatorics, dp, probabilities

Expecting Trouble

*special problem, probabilities

Counting Skyscrapers

dp, math, probabilities

Archer

math, probabilities

Random Ranking

dp, math, probabilities