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

Bad Luck Island

dp, probabilities

Need for Pink Slips

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

Game on Tree

implementation, math, probabilities, trees

Edge Split

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

Beautiful Mirrors

data structures, dp, math, probabilities

Good Trip

combinatorics, dp, math, probabilities

Let's Play Osu!

dp, math, probabilities

Puzzles

dfs and similar, math, probabilities, trees

Basketball Team

combinatorics, dp, math, probabilities

Score of a Tree

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

Willem, Chtholly and Seniorious

data structures, probabilities

Intercity Travelling

combinatorics, math, probabilities

Destiny

data structures, probabilities

Jon and Orbs

dp, math, probabilities

Arithmetic Progression

binary search, interactive, number theory, probabilities

Makoto and a Blackboard

dp, math, number theory, probabilities

Jerry's Protest

brute force, combinatorics, dp, probabilities

Flexible String Revisit

combinatorics, dp, math, probabilities

Game with String

implementation, probabilities, strings

Kuroni and the Punishment

math, number theory, probabilities

Falling Anvils

math, probabilities

LuoTianyi and the Floating Islands (Hard Version)

combinatorics, dfs and similar, math, probabilities, trees

Fafa and Ancient Alphabet

math, probabilities

Tree Array

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

Guess Game

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

Messages

brute force, dp, greedy, probabilities, sortings

I'm Feeling Lucky!

probabilities

Jeff and Furik

combinatorics, dp, probabilities

Subway Pursuit

binary search, interactive, probabilities

New Year and Arbitrary Arrangement

dp, math, probabilities

In Search of Truth (Easy Version)

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

Steps to One

dp, math, number theory, probabilities

Random Query

data structures, math, probabilities, two pointers

Interactive LowerBound

brute force, interactive, probabilities

Love-Hate

bitmasks, brute force, dp, probabilities

Another Sith Tournament

bitmasks, dp, math, probabilities

Wizards and Huge Prize

dp, math, probabilities

Gosha is hunting

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

Assimilation IV

combinatorics, dp, math, probabilities, two pointers

Ghd

brute force, math, probabilities

Fishes

data structures, graphs, greedy, probabilities, shortest paths

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

I Love Balls

combinatorics, math, probabilities

ace5 and Task Order

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

Kazaee

data structures, hashing, probabilities

Bubble Strike

combinatorics, math, probabilities, ternary search

Magic Trick

combinatorics, math, probabilities

Crypto Lights

combinatorics, dp, math, probabilities

Jellyfish and EVA

dp, graphs, greedy, math, probabilities

Second price auction

bitmasks, probabilities

Tourism

dp, graphs, probabilities

Amazing Trick

constructive algorithms, graph matchings, math, probabilities

Intersection and Union

data structures, dp, matrices, probabilities

Expected Destruction

combinatorics, dp, math, probabilities

X-OR

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

Lucky Probability

brute force, probabilities

Dexterina’s Lab

games, matrices, probabilities

Maxim and Restaurant

dp, math, probabilities

Card Bag

dp, math, probabilities

Intergalaxy Trips

probabilities, shortest paths

Robot Cleaner Revisit

implementation, math, probabilities

Koxia and Tree

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

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

Hyakugoku and Ladders

dp, probabilities, shortest paths

Little Elephant and Broken Sorting

dp, math, probabilities

Rare Coins

combinatorics, math, probabilities

Beautiful Bracket Sequence (easy version)

combinatorics, dp, probabilities

Something with XOR Queries

brute force, interactive, probabilities

Sports Betting

bitmasks, combinatorics, dp, graphs, math, probabilities

Tree Queries

data structures, probabilities, trees