Masha-forgetful

brute force, constructive algorithms, dp, hashing, implementation, strings

Arthur and Table

brute force, data structures, dp, greedy, math, sortings

Sequence Sorting

dp, greedy, two pointers

White Lines

brute force, data structures, dp, implementation, two pointers

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Palindromic characteristics

brute force, dp, hashing, strings

Playing Piano

constructive algorithms, dp

Maximum Subarray

data structures, dp, greedy, two pointers

Dima and Hares

dp, greedy

Yet Another Division Into Teams

dp, greedy, sortings

Cleaning

data structures, dp, greedy, math

Babaei and Birthday Cake

data structures, dp

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Valid Sets

dfs and similar, dp, math, trees

Koa and the Beach (Easy Version)

brute force, dp, greedy

The Fair Nut and Rectangles

data structures, dp, geometry

Dynasty Puzzles

dp

Porcelain

dp

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Connecting Universities

dfs and similar, dp, graphs, trees

Kay and Snowflake

data structures, dfs and similar, dp, trees

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Anton and Tree

dfs and similar, dp, trees

Nauuo and Circle

combinatorics, dfs and similar, dp, trees

Li Hua and Tree

brute force, data structures, dfs and similar, dp, implementation, trees

0-1-Tree

dfs and similar, divide and conquer, dp, dsu, trees

Fixed Points

binary search, brute force, dp

Small GCD

bitmasks, brute force, dp, math, number theory

Riverside Curio

data structures, dp, greedy

Compression

dp, implementation, math, number theory

How many trees?

combinatorics, divide and conquer, dp

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

Programming Competition

dfs and similar, dp, graph matchings, greedy, trees

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Robot Queries

binary search, data structures, dp, implementation

Divan and Kostomuksha (easy version)

dp, number theory

Vasya And The Mushrooms

dp, implementation

Escape The Maze (hard version)

dfs and similar, dp, greedy, shortest paths, trees

Moving Chips

bitmasks, dp, greedy

Watching Fireworks is Fun

data structures, dp, math

A Game with Traps

binary search, dp, greedy, sortings

Cow Program

dfs and similar, dp, graphs

Beautiful numbers

dp, number theory

Travelling Salesman and Special Numbers

brute force, combinatorics, dp

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Unlucky Numbers

brute force, dp, greedy, implementation

Coloring Brackets

dp

Portal

brute force, data structures, dp, greedy, implementation

Sum of Paths

combinatorics, dp, math

Weight the Tree

constructive algorithms, dfs and similar, dp, implementation, trees

Clique in the Divisibility Graph

dp, math, number theory

Spiders

dp, greedy, trees

MADMAX

dfs and similar, dp, games, graphs

Optimal Partition

data structures, dp

Stars Drawing (Hard Edition)

binary search, dp, greedy

Team Building

bitmasks, dp, greedy, sortings

Sum of Progression

brute force, data structures, dp, implementation, math

The Monster

dp, greedy, implementation, math

Yet Another Minimization Problem

divide and conquer, dp

Reberland Linguistics

dp, implementation, strings

Cashback

data structures, dp, greedy, math

Xor Tree

binary search, bitmasks, data structures, divide and conquer, dp, trees

Shuffling Songs

bitmasks, dfs and similar, dp, graphs, hashing, implementation, strings

Glass Half Spilled

dp

Phoenix and Computers

combinatorics, dp, math

Feed Cats

data structures, dp, sortings

Strip

binary search, data structures, dp, two pointers

Let's Play Osu!

dp, math, probabilities

Counting Factorizations

combinatorics, divide and conquer, dp, math, number theory

A BIT of an Inequality

bitmasks, brute force, dp, math

Arena

combinatorics, dp, math

Kaavi and Magic Spell

dp, strings

Lucky Common Subsequence

dp, strings

Earn or Unlock

bitmasks, brute force, dp

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Beautiful Mirrors

data structures, dp, math, probabilities

Image Preview

binary search, brute force, dp, two pointers

Two Chess Pieces

dfs and similar, dp, greedy, trees

Mahmoud and Ehab and the xor-MST

bitmasks, dp, graphs, implementation, math

Travel Card

binary search, dp

Once Again...

constructive algorithms, dp, matrices

Epidemic in Monstropolis

constructive algorithms, dp, greedy, two pointers

Recovering BST

brute force, dp, math, number theory, trees

Basketball Team

combinatorics, dp, math, probabilities

GCD on a grid

brute force, dfs and similar, dp, implementation, math, number theory

Mahmoud and a Dictionary

data structures, dfs and similar, dp, dsu, graphs

Jongmah

dp

Counting Arrays

combinatorics, dp, math, number theory

Pencils and Boxes

binary search, data structures, dp, greedy, two pointers

Looking for Order

bitmasks, dp

Music Festival

binary search, data structures, dp, greedy, sortings

Hills

dp

Score of a Tree

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

Cats Transport

data structures, dp

Vladik and Memorable Trip

dp, implementation

Good Trip

combinatorics, dp, math, probabilities

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Lucky Tree

dp, dsu, trees

Alyona and Strings

dp, strings