Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Learning to Paint

binary search, data structures, dfs and similar, dp, greedy, implementation, sortings

Pokémon Arena

data structures, graphs, greedy, implementation, shortest paths, sortings

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Microcycle

data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees

Minimize Inversions

constructive algorithms, data structures, greedy, implementation, sortings

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

LIS?

data structures, greedy, implementation

Vika and the Bridge

binary search, data structures, greedy, implementation, math, sortings

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Editorial for Two

binary search, data structures, greedy, implementation

Survey in Class

brute force, data structures, greedy, implementation, sortings

Traveling in Berland

binary search, data structures, graphs, greedy, implementation

Subsequence Addition (Easy Version)

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

Recent Actions

data structures, greedy, implementation, math

Three Sevens

brute force, data structures, greedy, implementation

Labeling the Tree with Distances

data structures, dp, greedy, hashing, implementation, trees

Rectangle Shrinking

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

Number Game

binary search, data structures, games, greedy, implementation

Zero-Sum Prefixes

brute force, data structures, dp, greedy, implementation

Misha and Paintings

constructive algorithms, data structures, greedy, implementation, math

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

Remove Prefix

data structures, greedy, implementation

Rain

binary search, brute force, data structures, geometry, greedy, implementation, math

awoo's Favorite Problem

binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers

Restoring the Duration of Tasks

data structures, greedy, implementation

Longest Strike

data structures, greedy, implementation, sortings, two pointers

Desktop Rearrangement

data structures, greedy, implementation

MinimizOR

bitmasks, brute force, data structures, divide and conquer, greedy, implementation, two pointers

Reverse Sort Sum

constructive algorithms, data structures, greedy, implementation, math, two pointers

Alice and the Cake

data structures, greedy, implementation, sortings

Rescheduling the Exam

binary search, data structures, greedy, implementation, math, sortings

Big Brush

constructive algorithms, data structures, greedy, implementation

Monsters And Spells

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

Strange Instructions

data structures, greedy, implementation

New School

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

Integers Shop

data structures, greedy, implementation

MEX and Increments

constructive algorithms, data structures, dp, greedy, implementation, math, sortings

Gardener and Tree

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

Portal

brute force, data structures, dp, greedy, implementation

The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Four Vertices

constructive algorithms, data structures, graphs, greedy, implementation, shortest paths

Points Movement

data structures, dp, greedy, implementation, sortings

Seating Arrangements (hard version)

data structures, greedy, implementation, sortings, two pointers

Game with Cards

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

Omkar and Medians

data structures, greedy, implementation

Robot Collisions

data structures, greedy, implementation, sortings

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Nastia Plays with a Tree

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

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Qingshan and Daniel

brute force, data structures, greedy, implementation

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Rating Compression

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

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Greedy Shopping

binary search, data structures, divide and conquer, greedy, implementation

Numbers on Whiteboard

constructive algorithms, data structures, greedy, implementation, math

Pokémon Army (hard version)

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

Shurikens

data structures, greedy, implementation

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Two Types of Spells

binary search, data structures, greedy, implementation, math, sortings

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Captain Flint and Treasure

data structures, dfs and similar, graphs, greedy, implementation, trees

Removing Leaves

data structures, greedy, implementation, trees

Reading Books (hard version)

data structures, greedy, implementation, sortings, ternary search, two pointers

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

Rotation Matching

constructive algorithms, data structures, greedy, implementation

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Restore the Permutation by Sorted Segments

brute force, constructive algorithms, data structures, greedy, implementation

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Drazil Likes Heap

constructive algorithms, data structures, greedy, implementation

Frog Jumps

binary search, data structures, dfs and similar, greedy, implementation

Movie Fan

*special problem, data structures, greedy, implementation, sortings

MEX maximizing

data structures, greedy, implementation, math

Berry Jam

data structures, dp, greedy, implementation

Portals

data structures, dp, greedy, implementation, sortings

Spaceship Solitaire

data structures, greedy, implementation

Decreasing Debts

constructive algorithms, data structures, graphs, greedy, implementation, math, two pointers

Queue in the Train

data structures, greedy, implementation

Alice and the Doll

brute force, data structures, greedy, implementation

Sum Queries?

data structures, greedy, implementation, math

Unstable String Sort

data structures, dfs and similar, dsu, graphs, greedy, implementation, strings

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Restore Permutation

binary search, data structures, greedy, implementation

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Minimal Segment Cover

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

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

TV Shows

data structures, greedy, implementation, sortings

Equalize the Remainders

data structures, greedy, implementation

Bus of Characters

data structures, greedy, implementation

Stack Sorting

constructive algorithms, data structures, greedy, implementation

Colorful Points

data structures, greedy, implementation

Credit Card

data structures, dp, greedy, implementation

Alyona and Spreadsheet

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

Order Book

data structures, greedy, implementation, sortings

Clique Problem

data structures, dp, greedy, implementation, sortings