Guess the Cycle Size

interactive, probabilities

A Compatible Pair

brute force, games

Bag of mice

dp, games, math, probabilities

Bicolored RBS

constructive algorithms, greedy

Lunar New Year and Food Ordering

data structures, implementation

Fools and Roads

data structures, dfs and similar, trees

Series of Crimes

brute force, geometry, implementation

Array Differentiation

bitmasks, brute force, constructive algorithms, dfs and similar, dp, graphs, math

Fake News (easy)

implementation, strings

Dima and Staircase

data structures, implementation

Ilya and Escalator

combinatorics, dp, math, probabilities

Group of Students

brute force, greedy, implementation

Polygon for the Angle

brute force, geometry

Power Consumption Calculation

implementation

Remove the Bracket

dp, greedy, math

Lucky Permutation

constructive algorithms, dfs and similar, graphs, greedy

Beautiful Array

brute force, data structures, divide and conquer, dp, greedy

Valiant's New Map

binary search, brute force, data structures, dp, two pointers

New Year and Curling

brute force, geometry, implementation, math

Minimax Problem

binary search, bitmasks, dp

Vasya and Basketball

binary search, brute force, data structures, implementation, sortings, two pointers

Merge Equals

data structures, implementation

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Cows and Poker Game

brute force, implementation

Chopping Carrots (Easy Version)

binary search, brute force, constructive algorithms, greedy, number theory

Glass Carving

binary search, data structures, implementation

K-special Tables

constructive algorithms, implementation

The Treasure of The Segments

binary search, data structures, greedy

Platforms Jumping

greedy

Fortune Telling

implementation, number theory

Dual (Hard Version)

constructive algorithms, math

Max Median

binary search, data structures, dp

Bear and Different Names

constructive algorithms, greedy

Birthday

math

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

Young Photographer

implementation

Shell Game

implementation

Ira and Flamenco

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

Minimum Value Rectangle

greedy

Electrification

binary search, brute force, greedy

Mr. Kitayuta's Gift

brute force, implementation, strings

Binary Search

binary search, constructive algorithms, greedy

New Year and the Permutation Concatenation

combinatorics, dp, math

Path Queries

divide and conquer, dsu, graphs, sortings, trees

Okabe and Boxes

data structures, greedy, trees

Broken Clock

brute force, implementation

Sereja and Stairs

greedy, implementation, sortings

K-good

constructive algorithms, math, number theory

Maximum Subsequence

bitmasks, divide and conquer, meet-in-the-middle

Ramesses and Corner Inversion

constructive algorithms, greedy, implementation, math

Average Sleep Time

data structures, implementation, math

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Feed the cat

greedy, math

Selection of Personnel

combinatorics, math

Chores

sortings

Rudolf and Snowflakes (hard version)

binary search, brute force, implementation, math

Unbearable Controversy of Being

brute force, combinatorics, dfs and similar, graphs

Determine Line

implementation

Office Keys

binary search, brute force, dp, greedy, sortings

Color Stripe

brute force, dp, greedy

Final Countdown

implementation, math, number theory

A Trivial Problem

brute force, constructive algorithms, math, number theory

Oleg and shares

implementation, math

Candies

implementation

Nineteen

Fair

graphs, greedy, number theory, shortest paths

Flood Fill

dp

Cards

constructive algorithms, dp, math

University Classes

implementation

Help Far Away Kingdom

strings

Queue

binary search, data structures

L-shapes

dfs and similar, implementation

New Year Ratings Change

greedy, sortings

Case of Matryoshkas

implementation

New Year and Rating

binary search, greedy, math

Mad City

dfs and similar, dsu, games, graphs, shortest paths, trees

Andrey and Escape from Capygrad

binary search, data structures, dp, dsu, greedy, sortings

Tree Shuffling

dfs and similar, dp, greedy, trees

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

Hamming Distance Sum

combinatorics, strings

Cows and Sequence

constructive algorithms, data structures, implementation

Superhero Battle

math

Pizza Separation

brute force, implementation

League of Leesins

constructive algorithms, implementation

Watto and Mechanism

binary search, data structures, hashing, string suffix structures, strings

Take a Guess

bitmasks, constructive algorithms, interactive, math

Valuable Resources

brute force, greedy

Modular Equations

math, number theory

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Neko does Maths

brute force, math, number theory

Vladik and Complicated Book

implementation, sortings

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

Bombs

greedy, implementation, sortings

Extra Element

implementation, math

Appending Mex

implementation

Covered Points Count

data structures, implementation, sortings

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Different Rules

constructive algorithms, greedy, implementation, math

Game Master

data structures, dfs and similar, dp, graphs, greedy, two pointers

Distances to Zero

constructive algorithms