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

Beautiful Matrix

combinatorics, data structures, dp

Tokitsukaze and Beautiful Subsegments

data structures

Raging Thunder

data structures, divide and conquer, implementation

Summer Homework

data structures, math

DFS

data structures

GCD is Greater

brute force, data structures, math, number theory

BRT Contract

data structures

Bug in Code

binary search, data structures, sortings

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Sasha and a Very Easy Test

data structures, number theory

Train Car Selection

data structures, greedy

Awards For Contestants

brute force, data structures, dp

Ehab and a weird weight formula

data structures, trees

Fedya the Potter Strikes Back

data structures, strings

Jamie and To-do List

data structures, interactive, trees

Encryption (hard)

data structures, dp

...Wait for it...

data structures, dsu, trees

Colored Tree

data structures, trees

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

New Year Presents

constructive algorithms, data structures

Timofey and our friends animals

data structures, divide and conquer, dsu

Fetch the Treasure

brute force, data structures, graphs, shortest paths

Rain of Fire

binary search, data structures, dfs and similar, dsu, graphs, implementation

Last Man Standing

brute force, data structures, number theory

Distance to the Path

data structures, dfs and similar, trees

Ratings and Reality Shows

data structures, two pointers

Nastya and CBS

brute force, data structures, hashing

Cyclic Cipher

chinese remainder theorem, data structures, implementation, number theory, two pointers

Berkomnadzor

data structures, greedy

Chess Strikes Back (hard version)

data structures, divide and conquer

Big Problems for Organizers

data structures, graphs, trees

Sweets

*special problem, data structures, implementation

Phys Ed Online

data structures, dp, greedy

Double Tree

data structures, divide and conquer, shortest paths, trees

Matches Are Not a Child's Play

data structures, trees

Mike and code of a permutation

constructive algorithms, data structures, graphs, sortings

Field Should Not Be Empty

brute force, data structures, divide and conquer

Array Game

data structures, games

Game On Tree

data structures, dfs and similar, greedy, trees

LuoTianyi and the Function

data structures

Huffman Coding on Segment

data structures, greedy

Cutting a Fence

binary search, data structures, dsu

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

Bear and Cavalry

data structures, divide and conquer, dp

Fence

binary search, data structures, string suffix structures

String Distance

binary search, brute force, data structures, hashing, implementation, strings

Optimizer

data structures, greedy, sortings

Exam

data structures, string suffix structures, trees

Gasoline prices

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

Electrical Efficiency

combinatorics, data structures, dp, math, number theory, trees

Noble Knight's Path

data structures, trees

Yet Another Partiton Problem

data structures, divide and conquer, dp, geometry, two pointers

Intervals of Intervals

binary search, data structures, two pointers

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

Squid Game

data structures, dfs and similar, greedy, trees

Arkady and a Nobody-men

data structures, dfs and similar, trees

Robots protection

data structures

Great City Saint Petersburg

data structures

Maximum Waterfall

data structures, dp, graphs, sortings

Bitwise Paradox

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

Edge Queries

data structures, dfs and similar, dp, dsu, graphs, trees

Nagini

binary search, data structures

Beautiful fountains rows

data structures

Chainword

brute force, data structures, dp, matrices, string suffix structures, strings

Magic Tree

*special problem, data structures, dp, trees

Decoding of Integer Sequences

*special problem, data structures, implementation

Equal LCM Subsets

data structures, math, number theory

Sherlock's bet to Moriarty

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees

Dividing Kingdom

binary search, brute force, data structures

Location

data structures, dp, math, number theory

Tiles for Bathroom

data structures, sortings, two pointers

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Almost Sorted

bitmasks, data structures, dp

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

The Awesomest Vertex

data structures, dfs and similar

Coins Exhibition

data structures, dp, math

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Qingshan and Daniel

brute force, data structures, greedy, implementation

Nim Shortcuts

data structures, games

Nauuo and Bug

data structures

Dasha and Photos

brute force, data structures, dp, implementation

Try Booking

data structures, divide and conquer

Gripping Story

binary search, data structures, sortings

Omkar and Time Travel

data structures, math

Most Dangerous Shark

data structures, dp, two pointers

Uncle Bogdan and Projections

data structures, geometry, sortings

Andrey's Tree

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

Forbidden Value

data structures, dp

Shifting Dominoes

data structures, geometry, graphs, trees

Adilbek and the Watering System

data structures, greedy, sortings

Colorful Tree Again

brute force, data structures, trees

Roadside Trees

data structures, dp

Game with Tokens

data structures, games, implementation

Organizing a Race

data structures, greedy

Bear and Chemistry

data structures, dfs and similar, graphs, trees

Rhombus

brute force, data structures, dp