Unique Array

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

Maze 2D

data structures, divide and conquer

Ultimate Weirdness of an Array

data structures, number theory

Gardener Alex

binary search, data structures

Bear and Bad Powers of 42

data structures

Interval Cubing

data structures, math

Cinema

brute force, data structures

Function

data structures

Lucky Arrays

data structures

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Functions On The Segments

data structures

Niyaz and Small Degrees

data structures, dp, trees

Little Pony and Lord Tirek

data structures

Almost Increasing Array

data structures, dp

Campus

binary search, data structures, dsu, trees

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Andryusha and Nervous Barriers

data structures, dp

Yaroslav and Points

data structures

Recursive Queries

data structures

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees

Magician and Pigs (Hard Version)

binary search, brute force, data structures, implementation

Alice and the Unfair Game

binary search, data structures, dp, dsu

Inversion Composition

constructive algorithms, data structures, greedy

Treeland and Viruses

data structures, dfs and similar, dp, shortest paths, trees

Ping-Pong

data structures

Jumping Around

binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths

Division + LCP (hard version)

binary search, brute force, data structures, divide and conquer, dsu, hashing, string suffix structures, strings

Magic multisets

data structures

Smart Cheater

data structures, math, probabilities

Summer Dichotomy

2-sat, data structures, dfs and similar, greedy

Weighted Increasing Subsequences

data structures, dp, math

Inna and Candy Boxes

data structures

Pairs of Paths

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

Lanterns

binary search, data structures, dp

Cook and Porridge

binary search, constructive algorithms, data structures, implementation

Maximums and Minimums

combinatorics, data structures, divide and conquer, number theory

Maximum Control (medium)

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

Chip Play

brute force, data structures, implementation

Robot and Candies

data structures, graph matchings, greedy

ALT

data structures, flows, graphs, trees

Memory and Casinos

data structures, math, probabilities

Parking Lot

data structures

Tourist

binary search, data structures, dp

Misha and Apples

brute force, data structures, dp, two pointers

Heidi and the Turing Test (Medium)

data structures

Karen and Cards

binary search, combinatorics, data structures, geometry

Paths

data structures, number theory

Clockwork Bomb

data structures, dfs and similar, dsu, greedy, trees

Robot Arm

data structures, geometry

Igloo Skyscraper

data structures, geometry

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Number of Components

data structures

Fire in the City

binary search, data structures

Kingdom of Criticism

data structures, dsu

Cats on the Upgrade (hard version)

binary search, data structures, dfs and similar, graphs, trees

Four Divisors

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

Buses and People

binary search, data structures, sortings

Longest Increasing Subsequence

data structures, dp

Two permutations

data structures

Startup Funding

binary search, constructive algorithms, data structures, probabilities, two pointers

Fibonacci-ish II

data structures, implementation

Chess Strikes Back (easy version)

binary search, data structures

Project Manager

brute force, data structures, implementation

Competition

data structures, greedy

Lucky Tickets

binary search, data structures, sortings, two pointers

Kuzya and Homework

data structures, number theory

Good Pairs

binary search, data structures, dp

Replace

binary search, data structures

Cute number

binary search, brute force, data structures, dsu, implementation, math

Biathlon Track

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

LCC

data structures, math, matrices, probabilities

Power Tree

data structures, trees

Two-Paths

data structures, dp, trees

Battalion Strength

data structures, divide and conquer, probabilities

Babysitting

2-sat, binary search, data structures, graphs, trees

Farmer John's Favorite Function

brute force, data structures, implementation, math

Forced Online Queries Problem

data structures, divide and conquer, dsu, graphs, trees

Ilya and Two Numbers

constructive algorithms, data structures, dsu, greedy

M-tree

data structures, math, sortings, trees

Camping Groups

data structures, sortings

Strange Instructions

data structures, greedy, implementation

Construct the String

data structures, dp, strings

Minimum Difference

data structures, hashing, sortings, two pointers

A New Beginning

data structures, dp, geometry, sortings

And Yet Another Bracket Sequence

data structures, greedy, hashing, string suffix structures, strings

Place Your Ad Here

data structures, sortings

Printer

binary search, data structures, implementation, sortings

The Next Good String

data structures, greedy, hashing, strings

Raffles

data structures, dp, greedy, math

Sereja and Straight Lines

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

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Concatenation with intersection

data structures, hashing, strings, two pointers

Birthday

data structures, dfs and similar, dp, trees

Keyboard Design

bitmasks, data structures, dp, string suffix structures, strings

Parking Lot

data structures, divide and conquer

Cartesian Tree

data structures

Yet Another Maxflow Problem

data structures, flows, graphs

Virus

data structures, divide and conquer, dsu, graphs

Beautiful Matrix

combinatorics, data structures, dp

Julia the snail

data structures, divide and conquer, dp