Necklace Assembly

brute force, dfs and similar, dp, graphs, greedy, number theory

Madoka and the Best School in Russia

constructive algorithms, dp, math, number theory

Number of Subsequences

combinatorics, dp, strings

Sagheer, the Hausmeister

bitmasks, brute force, dp

Vlad and Unfinished Business

dfs and similar, dp, greedy, trees

Clear the Multiset

data structures, divide and conquer, dp, greedy

Burenka and Traditions (hard version)

data structures, dp, greedy

Chip Move

brute force, dp, math

Omsk Metro (simple version)

data structures, dfs and similar, dp, graphs, greedy, math, trees

Tree XOR

bitmasks, dfs and similar, dp, greedy, trees

Generate a String

dfs and similar, dp

The Values You Can Make

dp

Longtail Hedgehog

dp, graphs

Ksyusha and Chinchilla

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

Maximum Submatrix 2

data structures, dp, implementation, sortings

Colored Balls

combinatorics, dp, math, sortings

Treasure Island

dfs and similar, dp, flows, hashing

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Riding in a Lift

combinatorics, dp

PermuTree (easy version)

dfs and similar, dp, trees

Zero Tree

dfs and similar, dp, greedy, trees

Pavel and Triangles

brute force, dp, fft, greedy, ternary search

Bear and Compressing

brute force, dfs and similar, dp, strings

Round Subset

dp, math

Serval and Rooted Tree

binary search, dfs and similar, dp, greedy, trees

A Twisty Movement

dp

Anfisa the Monkey

dp

Sonya and Problem Wihtout a Legend

dp, sortings

Frog Traveler

data structures, dfs and similar, dp, graphs, shortest paths, two pointers

GameGame

bitmasks, constructive algorithms, dp, games, greedy, math

Python Indentation

dp

Kalila and Dimna in the Logging Industry

dp, geometry

String Coloring (hard version)

data structures, dp

Keep the Average High

dp, greedy, math

Xor-Paths

bitmasks, brute force, dp, meet-in-the-middle

Restaurant

dp, greedy, sortings

Fish

bitmasks, dp, probabilities

Clique Problem

data structures, dp, greedy, implementation, sortings

Discrete Centrifugal Jumps

data structures, dp, graphs

Chocolate Bar

brute force, dp

Almost Arithmetical Progression

brute force, dp

Up the Strip

brute force, dp, math, number theory, two pointers

Toss a Coin to Your Graph...

binary search, dfs and similar, dp, graphs

Dima and Salad

dp

Subsequences

data structures, dp

Ciel and Gondolas

data structures, divide and conquer, dp

Qualification Rounds

bitmasks, brute force, constructive algorithms, dp

Little Pony and Harmony Chest

bitmasks, brute force, dp

Subsequences (easy version)

dp, graphs, implementation, shortest paths

The Bakery

binary search, data structures, divide and conquer, dp, two pointers

Pokémon Army (hard version)

data structures, divide and conquer, dp, greedy, implementation

You Are Given a Decimal String...

brute force, dp, shortest paths

A Simple Task

bitmasks, dp, graphs

Checkout Assistant

dp

MEX Sequences

dp, math

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Accommodation

brute force, dp, greedy, implementation

GCD Counting

data structures, dfs and similar, dp, number theory, trees

Moving to the Capital

dfs and similar, dp, graphs, shortest paths

Shaass and Bookshelf

dp, greedy

The Intriguing Obsession

combinatorics, dp, math

Efim and Strange Grade

dp, implementation, math

Mahmoud and a Message

brute force, dp, greedy, strings

Two Paths

dfs and similar, dp, graphs, shortest paths, trees, two pointers

Blocking Elements

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

Subsequences of Length Two

dp, strings

Timetable

dp

Chloe and pleasant prizes

dfs and similar, dp, graphs, trees

Palindrome pairs

*special problem, brute force, dp, strings

Divide by Three

dp, greedy, math, number theory

Nearest Beautiful Number (hard version)

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy

Sasha and a Walk in the City

combinatorics, dp, math, trees

Different Arrays

brute force, dp, implementation

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Wish I Knew How to Sort

dp, math, probabilities

Searchlights

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

Robbers' watch

brute force, combinatorics, dp, math

Fire

dp, sortings

Sequence

dp, sortings

The Contest

data structures, dp, greedy

Hanging Hearts

constructive algorithms, data structures, dfs and similar, dp, greedy, trees

Recycling Bottles

dp, geometry, greedy, implementation

Hot Start Up (easy version)

dp

Cut

binary search, data structures, dp, graphs, number theory, two pointers

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Jzzhu and Numbers

bitmasks, combinatorics, dp

Array Queries

brute force, data structures, dp

Bargaining Table

brute force, dp

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

LCIS

dp

Increasing Frequency

binary search, dp, greedy

Lena and Matrix

data structures, dp, geometry, shortest paths

White Lines

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

Magic Gems

dp, math, matrices

Buds Re-hanging

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

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Pictures with Kittens (easy version)

dp

Number With The Given Amount Of Divisors

brute force, dp, number theory

Zero-One (Hard Version)

dp, greedy

Yet Another Problem On a Subsequence

combinatorics, dp