Riverside Curio

data structures, dp, greedy

Programming Competition

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

0-1-Tree

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

Fixed Points

binary search, brute force, dp

Robot Queries

binary search, data structures, dp, implementation

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

Li Hua and Tree

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

Small GCD

bitmasks, brute force, dp, math, number theory

Anton and Tree

dfs and similar, dp, trees

Nauuo and Circle

combinatorics, dfs and similar, dp, trees

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

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

Porcelain

dp

Dynasty Puzzles

dp

The Fair Nut and Rectangles

data structures, dp, geometry

Koa and the Beach (Easy Version)

brute force, dp, greedy

Valid Sets

dfs and similar, dp, math, trees

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Babaei and Birthday Cake

data structures, dp

Cleaning

data structures, dp, greedy, math

Yet Another Division Into Teams

dp, greedy, sortings

Dima and Hares

dp, greedy

Playing Piano

constructive algorithms, dp

Maximum Subarray

data structures, dp, greedy, two pointers

Palindromic characteristics

brute force, dp, hashing, strings

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Sequence Sorting

dp, greedy, two pointers

Arthur and Table

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

Masha-forgetful

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

XOR Equation

dp, math

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Yet Another Problem On a Subsequence

combinatorics, dp

Zero-One (Hard Version)

dp, greedy

Number With The Given Amount Of Divisors

brute force, dp, number theory

Pictures with Kittens (easy version)

dp

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Buds Re-hanging

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

Magic Gems

dp, math, matrices

White Lines

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

Lena and Matrix

data structures, dp, geometry, shortest paths

Increasing Frequency

binary search, dp, greedy

LCIS

dp

Rudolf and CodeVid-23

bitmasks, dp, graphs, greedy, shortest paths

Array Queries

brute force, data structures, dp

Bargaining Table

brute force, dp

Jzzhu and Numbers

bitmasks, combinatorics, dp

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

Recycling Bottles

dp, geometry, greedy, implementation

Hanging Hearts

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

The Contest

data structures, dp, greedy

Sequence

dp, sortings

Fire

dp, sortings

Robbers' watch

brute force, combinatorics, dp, math

Searchlights

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

Wish I Knew How to Sort

dp, math, probabilities

XOR Inverse

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

Sasha and a Walk in the City

combinatorics, dp, math, trees

Different Arrays

brute force, dp, implementation

Nearest Beautiful Number (hard version)

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

Divide by Three

dp, greedy, math, number theory

Chloe and pleasant prizes

dfs and similar, dp, graphs, trees

Palindrome pairs

*special problem, brute force, dp, strings

Timetable

dp

Subsequences of Length Two

dp, strings

Blocking Elements

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

Two Paths

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

Mahmoud and a Message

brute force, dp, greedy, strings

Efim and Strange Grade

dp, implementation, math

The Intriguing Obsession

combinatorics, dp, math

Shaass and Bookshelf

dp, greedy

Moving to the Capital

dfs and similar, dp, graphs, shortest paths

Accommodation

brute force, dp, greedy, implementation

GCD Counting

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

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Checkout Assistant

dp

MEX Sequences

dp, math

A Simple Task

bitmasks, dp, graphs

You Are Given a Decimal String...

brute force, dp, shortest paths

Pokémon Army (hard version)

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

The Bakery

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

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Qualification Rounds

bitmasks, brute force, constructive algorithms, dp

Little Pony and Harmony Chest

bitmasks, brute force, dp

Ciel and Gondolas

data structures, divide and conquer, dp

Subsequences

data structures, dp

Dima and Salad

dp

Toss a Coin to Your Graph...

binary search, dfs and similar, dp, graphs

Up the Strip

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

Almost Arithmetical Progression

brute force, dp

Chocolate Bar

brute force, dp

Discrete Centrifugal Jumps

data structures, dp, graphs

Clique Problem

data structures, dp, greedy, implementation, sortings

Fish

bitmasks, dp, probabilities

Restaurant

dp, greedy, sortings

Xor-Paths

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