Divide Points

constructive algorithms, geometry, math

K Integers

binary search, data structures

Key Storage

combinatorics, math

Spaceship Solitaire

data structures, greedy, implementation

Beautiful Mirrors

data structures, dp, math, probabilities

Editor

data structures, implementation

Point Ordering

constructive algorithms, geometry, interactive, math

Send Boxes to Alice (Hard Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Antenna Coverage

data structures, dp, greedy, sortings

Road Construction

flows, graphs

Addition Robot

data structures, math, matrices

Tiling Terrace

brute force, dp

Performance Review

data structures

Songwriter

greedy, two pointers

Cleaning Robots

dp, trees

Voting (Easy Version)

data structures, dp, greedy

Discarding Game

dp, greedy, two pointers

The Coronation

graphs, implementation

Trip to Saint Petersburg

data structures

Maximum Weight Subset

dp, trees

Daniel and Spring Cleaning

bitmasks, brute force, combinatorics, dp

Hyakugoku and Ladders

dp, probabilities, shortest paths

Chips

constructive algorithms, implementation

Queue in the Train

data structures, greedy, implementation

The Maximum Subtree

dfs and similar, dp, graphs, trees

Keyboard Purchase

bitmasks, dp

Alice and the Doll

brute force, data structures, greedy, implementation

Yet Another Substring Reverse

bitmasks, dp

Middle-Out

constructive algorithms, greedy, strings

Another Filling the Grid

combinatorics, dp, math

Wrong Answer on test 233 (Easy Version)

dp

Arson In Berland Forest

binary search, graphs, graphs, shortest paths

Rock Is Push

binary search, dp

Paint the Tree

dp, sortings, trees

Tourism

dfs and similar, dp, dsu, graphs, greedy, trees

The Light Square

2-sat, dfs and similar, greedy

Sum Queries?

data structures, greedy, implementation, math

Coloring Edges

constructive algorithms, dfs and similar, graphs

Wi-Fi

data structures, dp, greedy

Numerical Sequence (hard version)

binary search, math

Marbles

bitmasks, dp

Unstable String Sort

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

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Let Them Slide

data structures, implementation

Remainder Problem

brute force, data structures, implementation

Natasha, Sasha and the Prefix Sums

combinatorics, dp, math, number theory

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Complete the Projects (hard version)

dp, greedy

Complete the Projects (easy version)

greedy

You Are Given a WASD-string...

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

Treasure Hunting

binary search, dp, greedy, implementation

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Rectangle Painting 1

dp

Culture Code

binary search, combinatorics, data structures, dp, shortest paths, sortings

K-th Path

brute force, constructive algorithms, shortest paths, sortings

OpenStreetMap

data structures, two pointers

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Tokitsukaze and Duel

brute force, games, greedy

Count Pairs

math, matrices, number theory, two pointers

Tree Painting

dfs and similar, dp, trees

Playlist for Polycarp (easy version)

bitmasks, combinatorics, dp

Two Pizzas

bitmasks, brute force

Daleks' Invasion (medium)

dfs and similar, graphs, shortest paths, trees

Heidi and the Turing Test (Medium)

data structures

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

Heidi Learns Hashing (Medium)

brute force, number theory

Topforces Strikes Back

brute force, math, sortings

Product Oriented Recurrence

dp, math, matrices, number theory

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Serge and Dining Room

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

Short Colorful Strip

combinatorics, dfs and similar, dp

Destroy it!

dp, implementation, sortings

Minimal Segment Cover

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

Nauuo and Pictures (easy version)

dp, probabilities

And Reachability

bitmasks, dp

Scalar Queries

combinatorics, data structures, math, sortings

Range Deleting

binary search, combinatorics, data structures, two pointers

The LCMs Must be Large

bitmasks, brute force, constructive algorithms, math, number theory

Cute Sequences

binary search, brute force, greedy, math

Mysterious Code

dp, strings

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

The minimal unique substring

constructive algorithms, math, strings

Inverse of Rows and Columns

brute force, constructive algorithms

Card Bag

dp, math, probabilities

Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers

0-1-Tree

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

Guess the Root

brute force, interactive, math

Minimum Possible LCM

brute force, greedy, math, number theory

Shovels Shop

dp, greedy, sortings

Serval and Snake

binary search, brute force, interactive

Neko and Aki's Prank

dp, greedy, trees

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Number of Components

combinatorics, data structures, dp, math

Three Religions

dp, implementation, strings

Earth Wind and Fire

constructive algorithms, greedy, math, sortings, two pointers

Frog Jumping

dfs and similar, math, number theory

Palindrome-less Arrays

combinatorics, divide and conquer, dp

Steps to One

dp, math, number theory, probabilities

Nastya Hasn't Written a Legend

binary search, data structures

Knapsack

dfs and similar, dp, greedy