Rudolf and k Bridges

binary search, data structures, dp, two pointers

Xenia and Weights

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Tokitsukaze and Strange Inequality

brute force, data structures, dp

Slime

dp, greedy, implementation

Bargain

combinatorics, dp, math

Fake Plastic Trees

dfs and similar, dp, greedy, trees

Ladder

dp, implementation, two pointers

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Not Adding

brute force, dp, math, number theory

Painting Fence

divide and conquer, dp, greedy

Short Task

brute force, dp, math, number theory

Coloring Trees

dp

Radio Towers

combinatorics, dp, math

Party Lemonade

bitmasks, dp, greedy

How Does the Rook Move?

combinatorics, dp, math

Correct Placement

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

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

Easy Problem

dp

Writing Code

dp

Star sky

dp, implementation

Booking System

binary search, dp, greedy, implementation

Almost Identity Permutations

combinatorics, dp, math

Bakry and Partitioning

bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees

Jellyfish and Mex

dp

Berry Jam

data structures, dp, greedy, implementation

Two Platforms

binary search, dp, sortings, two pointers

Nastya and Scoreboard

bitmasks, dp, graphs, greedy

Catching Cheaters

dp, strings

Alternative Thinking

dp, greedy, math

Boris and His Amazing Haircut

constructive algorithms, data structures, dp, dsu, greedy, sortings

Playoff Tournament

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

Yet Another Minimization Problem

dp, greedy, math

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees

Explorer Space

dp, graphs, shortest paths

Rating System

binary search, brute force, data structures, dp, dsu, greedy, math, two pointers

Ranom Numbers

brute force, dp, greedy, math, strings

Clear the String

dp

Problem with Random Tests

brute force, dp, greedy, probabilities

Tree with Maximum Cost

dfs and similar, dp, trees

Paint the Tree

brute force, constructive algorithms, dp, graphs, implementation, trees

Yet Another Monster Killing Problem

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

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

Bicolorings

bitmasks, dp

Don't Blame Me

bitmasks, combinatorics, dp, math

String Coloring (easy version)

constructive algorithms, dp, graphs, greedy, sortings

The Number of Imposters

constructive algorithms, dfs and similar, dp, dsu, graphs

Gambling

data structures, dp, greedy, math

Standard Free2play

dp, greedy, math

Tree Tag

dfs and similar, dp, games, trees

Ivan the Fool and the Probability Theory

combinatorics, dp, math

Really Big Numbers

binary search, brute force, dp, math

Alyona and the Tree

dfs and similar, dp, graphs, trees

Zookeeper and The Infinite Zoo

bitmasks, constructive algorithms, dp, greedy, math

Permute Digits

dp, greedy

Letter Picking

constructive algorithms, dp, games, two pointers

Omkar and Determination

data structures, dp

Bag of mice

dp, games, math, probabilities

K-periodic Garland

brute force, dp, greedy

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Valiant's New Map

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

Remove the Bracket

dp, greedy, math

Array Differentiation

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

Beautiful Array

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

Minimax Problem

binary search, bitmasks, dp

Ilya and Escalator

combinatorics, dp, math, probabilities

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

New Year and the Permutation Concatenation

combinatorics, dp, math

Office Keys

binary search, brute force, dp, greedy, sortings

Andrey and Escape from Capygrad

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

Color Stripe

brute force, dp, greedy

Flood Fill

dp

Tree Shuffling

dfs and similar, dp, greedy, trees

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Game Master

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

Strange Beauty

dp, math, number theory, sortings

Long Path

dp, implementation

Tokitsukaze and Good 01-String (hard version)

dp, greedy, implementation

BA-String

brute force, dp, greedy, implementation, math

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

An impassioned circulation of affection

brute force, dp, strings, two pointers

Sorting By Multiplication

dp, greedy

New Year Parties

dp, greedy

Alyona and Spreadsheet

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

A and B and Interesting Substrings

data structures, dp, two pointers

Round Table Knights

dp, math, number theory

Yet Another Monster Fight

binary search, dp, greedy, implementation, math

Two Hundred Twenty One (easy version)

data structures, dp, math

Skyscrapers (hard version)

data structures, dp, greedy

Minimizing the Sum

dp, implementation

Greenhouse Effect

dp

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

A Wide, Wide Graph

dfs and similar, dp, graphs, greedy, trees

Minimum Maximum Distance

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

Slime Escape

data structures, dp, greedy, two pointers

Infinite Set

bitmasks, dp, math, matrices, number theory, strings

Queries for Number of Palindromes

dp, hashing, strings

Unfair Game

dp, games, greedy, math, schedules

Education

brute force, dp, greedy, implementation