Die Roll

math, probabilities

Special Permutation

constructive algorithms, probabilities

Dreamoon and WiFi

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

Sum of Two Numbers

constructive algorithms, greedy, implementation, math, probabilities

Red-Blue Shuffle

math, probabilities

Journey

dfs and similar, dp, graphs, probabilities, trees

Archer

math, probabilities

Random Events

dp, math, probabilities

Little Pony and Expected Maximum

probabilities

Problem with Random Tests

brute force, dp, greedy, probabilities

Bag of mice

dp, games, math, probabilities

Guess the Cycle Size

interactive, probabilities

Ilya and Escalator

combinatorics, dp, math, probabilities

Santa's Bot

combinatorics, math, probabilities

Tournament Countdown

constructive algorithms, greedy, interactive, number theory, probabilities

Wet Shark and Flowers

combinatorics, math, number theory, probabilities

Need for Pink Slips

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

Bad Luck Island

dp, probabilities

Andrey and Problem

greedy, math, probabilities

Fish

bitmasks, dp, probabilities

LuoTianyi and the Floating Islands (Easy Version)

combinatorics, math, probabilities, trees

Wish I Knew How to Sort

dp, math, probabilities

Checkpoints

brute force, constructive algorithms, greedy, math, probabilities

Edge Split

brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees

Game on Tree

implementation, math, probabilities, trees

Puzzles

dfs and similar, math, probabilities, trees

Let's Play Osu!

dp, math, probabilities

Beautiful Mirrors

data structures, dp, math, probabilities

Basketball Team

combinatorics, dp, math, probabilities

Score of a Tree

bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees

Good Trip

combinatorics, dp, math, probabilities

Willem, Chtholly and Seniorious

data structures, probabilities

Intercity Travelling

combinatorics, math, probabilities

Arithmetic Progression

binary search, interactive, number theory, probabilities

Destiny

data structures, probabilities

Jon and Orbs

dp, math, probabilities

Jerry's Protest

brute force, combinatorics, dp, probabilities

Game with String

implementation, probabilities, strings

Makoto and a Blackboard

dp, math, number theory, probabilities

Falling Anvils

math, probabilities

Flexible String Revisit

combinatorics, dp, math, probabilities

Fafa and Ancient Alphabet

math, probabilities

Tree Array

brute force, combinatorics, dp, graphs, math, probabilities, trees

LuoTianyi and the Floating Islands (Hard Version)

combinatorics, dfs and similar, math, probabilities, trees

Guess Game

bitmasks, data structures, games, math, probabilities, sortings, strings, trees

I'm Feeling Lucky!

probabilities

Messages

brute force, dp, greedy, probabilities, sortings

Kuroni and the Punishment

math, number theory, probabilities

Subway Pursuit

binary search, interactive, probabilities

Jeff and Furik

combinatorics, dp, probabilities

New Year and Arbitrary Arrangement

dp, math, probabilities

In Search of Truth (Easy Version)

constructive algorithms, interactive, math, meet-in-the-middle, probabilities

Random Query

data structures, math, probabilities, two pointers

Interactive LowerBound

brute force, interactive, probabilities

Wizards and Huge Prize

dp, math, probabilities

Love-Hate

bitmasks, brute force, dp, probabilities

Gosha is hunting

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

Steps to One

dp, math, number theory, probabilities

Assimilation IV

combinatorics, dp, math, probabilities, two pointers

Ghd

brute force, math, probabilities

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Another Sith Tournament

bitmasks, dp, math, probabilities

Shooting Gallery

dp, probabilities

Alternating Tree

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

Broken robot

dp, math, probabilities

Expected Damage

binary search, combinatorics, probabilities

Cards

combinatorics, dp, math, number theory, probabilities

Vasya and Magic Matrix

dp, math, probabilities

Inversion Expectation

dp, math, probabilities

Bubble Strike

combinatorics, math, probabilities, ternary search

ace5 and Task Order

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

Crypto Lights

combinatorics, dp, math, probabilities

Second price auction

bitmasks, probabilities

Kazaee

data structures, hashing, probabilities

Jellyfish and EVA

dp, graphs, greedy, math, probabilities

Amazing Trick

constructive algorithms, graph matchings, math, probabilities

Intersection and Union

data structures, dp, matrices, probabilities

Magic Trick

combinatorics, math, probabilities

Expected Destruction

combinatorics, dp, math, probabilities

Maxim and Restaurant

dp, math, probabilities

Dexterina’s Lab

games, matrices, probabilities

Robot Cleaner Revisit

implementation, math, probabilities

Card Bag

dp, math, probabilities

Lucky Probability

brute force, probabilities

Intergalaxy Trips

probabilities, shortest paths

Koxia and Tree

combinatorics, dfs and similar, dp, dsu, math, probabilities, trees

Tourism

dp, graphs, probabilities

Kleofáš and the n-thlon

dp, math, probabilities

LRU

bitmasks, dp, math, probabilities

First Digit Law

dp, math, probabilities

ZS and The Birthday Paradox

math, number theory, probabilities

Little Elephant and Broken Sorting

dp, math, probabilities

Something with XOR Queries

brute force, interactive, probabilities

Beautiful Bracket Sequence (easy version)

combinatorics, dp, probabilities

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Name That Tune

dp, probabilities, two pointers

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Tree Queries

data structures, probabilities, trees

Beautiful Mirrors with queries

data structures, probabilities

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities