Mashmokh and Water Tanks

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

Katya and Segments Sets

data structures, interactive, sortings

Shave Beaver!

data structures

Maze 2D

data structures, divide and conquer

Treeland and Viruses

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

Ultimate Weirdness of an Array

data structures, number theory

Gardener Alex

binary search, data structures

Bear and Bad Powers of 42

data structures

Niyaz and Small Degrees

data structures, dp, trees

Cinema

brute force, data structures

Interval Cubing

data structures, math

XOR Partition

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

Little Pony and Lord Tirek

data structures

Function

data structures

Inversion Composition

constructive algorithms, data structures, greedy

Lucky Arrays

data structures

Functions On The Segments

data structures

Almost Increasing Array

data structures, dp

Yaroslav and Points

data structures

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

Tree Weights

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

Recursive Queries

data structures

Magician and Pigs (Hard Version)

binary search, brute force, data structures, implementation

Alice and the Unfair Game

binary search, data structures, dp, dsu

Ping-Pong

data structures

Jumping Around

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

Smart Cheater

data structures, math, probabilities

Cook and Porridge

binary search, constructive algorithms, data structures, implementation

Summer Dichotomy

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

Lanterns

binary search, data structures, dp

Magic multisets

data structures

Weighted Increasing Subsequences

data structures, dp, math

Inna and Candy Boxes

data structures

Pairs of Paths

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

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

Tourist

binary search, data structures, dp

Robot and Candies

data structures, graph matchings, greedy

Memory and Casinos

data structures, math, probabilities

ALT

data structures, flows, graphs, trees

Parking Lot

data structures

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

Kingdom of Criticism

data structures, dsu

Cats on the Upgrade (hard version)

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

Battalion Strength

data structures, divide and conquer, probabilities

Fire in the City

binary search, data structures

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

Fibonacci-ish II

data structures, implementation

Two permutations

data structures

Startup Funding

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

Chess Strikes Back (easy version)

binary search, data structures

Farmer John's Favorite Function

brute force, data structures, implementation, math

Project Manager

brute force, data structures, implementation

Babysitting

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

Good Pairs

binary search, data structures, dp

Competition

data structures, greedy

Replace

binary search, data structures

Kuzya and Homework

data structures, number theory

Lucky Tickets

binary search, data structures, sortings, two pointers

Cute number

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

LCC

data structures, math, matrices, probabilities

Power Tree

data structures, trees

Biathlon Track

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

Two-Paths

data structures, dp, trees

M-tree

data structures, math, sortings, trees

Forced Online Queries Problem

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

Ilya and Two Numbers

constructive algorithms, data structures, dsu, greedy

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

Printer

binary search, data structures, implementation, sortings

Place Your Ad Here

data structures, sortings

And Yet Another Bracket Sequence

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

The Next Good String

data structures, greedy, hashing, strings

Raffles

data structures, dp, greedy, math

Concatenation with intersection

data structures, hashing, strings, two pointers

Sereja and Straight Lines

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

Keyboard Design

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

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Birthday

data structures, dfs and similar, dp, trees

Cartesian Tree

data structures

Parking Lot

data structures, divide and conquer

Virus

data structures, divide and conquer, dsu, graphs

Yet Another Maxflow Problem

data structures, flows, graphs

Julia the snail

data structures, divide and conquer, dp