Maximum Value

binary search, math, sortings, two pointers

Ciel the Commander

constructive algorithms, dfs and similar, divide and conquer, greedy, trees

K-periodic Garland

brute force, dp, greedy

Gena's Code

implementation, math

Walking Boy

greedy

Businessmen Problems

sortings

Peculiar apple-tree

dfs and similar, graphs, trees

Bag of mice

dp, games, math, probabilities

Pasha Maximizes

greedy

Order Book

data structures, greedy, implementation, sortings

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Lazy Security Guard

brute force, geometry, math

Mancala

brute force, implementation

Array Division

binary search, data structures, implementation

Guess the Cycle Size

interactive, probabilities

Hidden Permutations

dfs and similar, interactive, math

Dima and To-do List

brute force, implementation

Fools and Roads

data structures, dfs and similar, trees

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Fake News (easy)

implementation, strings

Max Median

binary search, data structures, dp

A Compatible Pair

brute force, games

Series of Crimes

brute force, geometry, implementation

Final Countdown

implementation, math, number theory

Valiant's New Map

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

Remove the Bracket

dp, greedy, math

Lunar New Year and Food Ordering

data structures, implementation

Lucky Permutation

constructive algorithms, dfs and similar, graphs, greedy

Array Differentiation

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

Beautiful Array

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

Group of Students

brute force, greedy, implementation

Ilya and Escalator

combinatorics, dp, math, probabilities

Minimax Problem

binary search, bitmasks, dp

Dima and Staircase

data structures, implementation

Power Consumption Calculation

implementation

Vasya and Basketball

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

Polygon for the Angle

brute force, geometry

The Treasure of The Segments

binary search, data structures, greedy

New Year and Curling

brute force, geometry, implementation, math

Young Photographer

implementation

Merge Equals

data structures, implementation

Dual (Hard Version)

constructive algorithms, math

Chopping Carrots (Easy Version)

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

Cows and Poker Game

brute force, implementation

Glass Carving

binary search, data structures, implementation

Tree Requests

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

Fortune Telling

implementation, number theory

Platforms Jumping

greedy

K-special Tables

constructive algorithms, implementation

Ira and Flamenco

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

Bear and Different Names

constructive algorithms, greedy

Birthday

math

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Shell Game

implementation

Average Sleep Time

data structures, implementation, math

Okabe and Boxes

data structures, greedy, trees

Path Queries

divide and conquer, dsu, graphs, sortings, trees

Electrification

binary search, brute force, greedy

Minimum Value Rectangle

greedy

Maximum Subsequence

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

Superhero Battle

math

Mr. Kitayuta's Gift

brute force, implementation, strings

New Year and the Permutation Concatenation

combinatorics, dp, math

K-good

constructive algorithms, math, number theory

Candies

implementation

Sereja and Stairs

greedy, implementation, sortings

Broken Clock

brute force, implementation

Rudolf and Snowflakes (hard version)

binary search, brute force, implementation, math

Ramesses and Corner Inversion

constructive algorithms, greedy, implementation, math

Office Keys

binary search, brute force, dp, greedy, sortings

Chores

sortings

Selection of Personnel

combinatorics, math

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

Oleg and shares

implementation, math

Feed the cat

greedy, math

Unbearable Controversy of Being

brute force, combinatorics, dfs and similar, graphs

Color Stripe

brute force, dp, greedy

A Trivial Problem

brute force, constructive algorithms, math, number theory

Mad City

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

Determine Line

implementation

Andrey and Escape from Capygrad

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

Nineteen

Neko does Maths

brute force, math, number theory

Flood Fill

dp

Fair

graphs, greedy, number theory, shortest paths

L-shapes

dfs and similar, implementation

University Classes

implementation

Help Far Away Kingdom

strings

Cards

constructive algorithms, dp, math

Queue

binary search, data structures

Bitwise Operation Wizard

bitmasks, constructive algorithms, greedy, interactive, math

New Year Ratings Change

greedy, sortings

Case of Matryoshkas

implementation

League of Leesins

constructive algorithms, implementation

New Year and Rating

binary search, greedy, math

Tree Shuffling

dfs and similar, dp, greedy, trees

Cows and Sequence

constructive algorithms, data structures, implementation

Hamming Distance Sum

combinatorics, strings

Take a Guess

bitmasks, constructive algorithms, interactive, math

Magic Triples (Easy Version)

brute force, data structures, math, number theory