Time to Raid Cowavans

brute force, data structures, sortings

Messenger

data structures, hashing, implementation, string suffix structures, strings

Arithmetic Operations

brute force, data structures, graphs, math

Permutation Sorting

data structures, sortings

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Sorting Books

data structures, dp, greedy

Cloud Computing

data structures, greedy

Lipshitz Sequence

data structures, math

Bindian Signalizing

data structures

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Wine Factory (Easy Version)

data structures, greedy

DeadLee

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

LIS of Sequence

data structures, dp, greedy, hashing, math

Game of the Year

brute force, data structures, math, number theory

Irrigation

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

Valera and Queries

binary search, data structures

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

The way home

binary search, data structures, dp, graphs, greedy, shortest paths, sortings

MEX of LCM

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

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Drazil and Park

data structures

Editorial for Two

binary search, data structures, greedy, implementation

Spaceship Solitaire

data structures, greedy, implementation

Teodor is not a liar!

data structures, dp

Two Hundred Twenty One (hard version)

data structures, math

Subset Sums

brute force, data structures

Points

data structures

Partition Game

binary search, data structures, divide and conquer, dp

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Happy Life in University

data structures, dfs and similar, greedy, trees

Voting (Easy Version)

data structures, dp, greedy

Pairwise Modulo

data structures, math

Ivan and Burgers

data structures, divide and conquer, greedy, math

Complicated Computations

binary search, data structures, two pointers

New Year Tree

data structures, divide and conquer, trees

Array and Segments (Hard version)

data structures, implementation

Tourists

data structures, dfs and similar, graphs, trees

Fedor and coupons

binary search, data structures, greedy, sortings

Subordinates

constructive algorithms, data structures, graphs, greedy, sortings

Anya and the Mysterious String

binary search, data structures

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Divide Square

data structures, geometry, implementation, sortings

Fruit Sequences

binary search, data structures, divide and conquer, dp, two pointers

Sign on Fence

binary search, constructive algorithms, data structures

Ball Sorting

data structures, dp, sortings

Two Types of Spells

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

Suspects

constructive algorithms, data structures, implementation

Cartons of milk

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

Yaroslav and Divisors

data structures

Random Query

data structures, math, probabilities, two pointers

Product Sum

data structures, dp, geometry

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Domino Principle

binary search, data structures, sortings

Multi-Colored Segments

binary search, data structures, math, sortings

Envy

data structures, dsu, graphs

Not Escaping

data structures, dp, implementation, shortest paths, two pointers

Staircases

brute force, combinatorics, data structures, dfs and similar, dp, implementation, math

Statistics of Recompressing Videos

*special problem, data structures, implementation

Pattern Matching

bitmasks, data structures, dfs and similar, graphs, hashing, sortings, strings

Leha and another game about graph

constructive algorithms, data structures, dfs and similar, dp, graphs

Removing Leaves

data structures, greedy, implementation, trees

Shark

brute force, data structures, dsu, trees

Dense Subsequence

data structures, greedy, strings

Maxim and Array

constructive algorithms, data structures, greedy, math

Hot Start Up (hard version)

data structures, dp

Space Harbour

data structures, implementation, math, sortings

Analysis of Pathes in Functional Graph

data structures, graphs

Army Creation

binary search, data structures

Magic Triples (Hard Version)

brute force, data structures, math, number theory

TV Shows

data structures, greedy, implementation, sortings

Imbalance Value of a Tree

data structures, dsu, graphs, trees

Pudding Monsters

data structures, divide and conquer

Connected Components

data structures, dfs and similar, dp, dsu

Felicity is Coming!

data structures, hashing, sortings, strings

Lunar New Year and Red Envelopes

data structures, dp

Anonymity Is Important

binary search, brute force, data structures, dsu, greedy, sortings

Misha and Permutations Summation

data structures

Driving Test

data structures, dp, greedy

Unstable String Sort

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

Counting Shortcuts

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

Wi-Fi

data structures, dp, greedy

Permutation Separation

data structures, divide and conquer

Monitor

binary search, data structures

Rain

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

Kill Anton

brute force, constructive algorithms, data structures, math, strings

You Are Given a WASD-string...

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

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

Voting (Hard Version)

binary search, data structures, greedy

Learning to Paint

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

Handshakes

binary search, constructive algorithms, data structures, greedy

Pinball

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

Lexicographically Small Enough

brute force, data structures, greedy, strings

MEX Queries

binary search, data structures, trees

Range Deleting

binary search, combinatorics, data structures, two pointers

Sereja ans Anagrams

binary search, data structures

Machine Learning

brute force, data structures

Kindergarten

data structures, dp, greedy

XOR Tree

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

388535 (Hard Version)

bitmasks, brute force, data structures, math

Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths

data structures, dfs and similar, trees