High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

Mark and Professor Koro

binary search, bitmasks, brute force, combinatorics, data structures, greedy

Bombs

data structures, two pointers

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

Addition on Segments

bitmasks, data structures, divide and conquer, dp

Cloud Computing

data structures, greedy

Sorting Books

data structures, dp, greedy

Lipshitz Sequence

data structures, math

Cyclical Quest

data structures, string suffix structures, strings

Permutation Sorting

data structures, sortings

Ball

data structures, sortings

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Bindian Signalizing

data structures

LIS of Sequence

data structures, dp, greedy, hashing, math

DeadLee

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

Irrigation

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

Game of the Year

brute force, data structures, math, number theory

Wine Factory (Easy Version)

data structures, greedy

Valera and Queries

binary search, data structures

The way home

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

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Gosha is hunting

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

MEX of LCM

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

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

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Partition Game

binary search, data structures, divide and conquer, dp

Subset Sums

brute force, data structures

Happy Life in University

data structures, dfs and similar, greedy, trees

Points

data structures

Pairwise Modulo

data structures, math

Voting (Easy Version)

data structures, dp, greedy

Complicated Computations

binary search, data structures, two pointers

New Year Tree

data structures, divide and conquer, trees

Ivan and Burgers

data structures, divide and conquer, greedy, math

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

Fruit Sequences

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

Sign on Fence

binary search, constructive algorithms, data structures

Divide Square

data structures, geometry, implementation, sortings

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

Random Query

data structures, math, probabilities, two pointers

Yaroslav and Divisors

data structures

Domino Principle

binary search, data structures, sortings

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Envy

data structures, dsu, graphs

Product Sum

data structures, dp, geometry

Multi-Colored Segments

binary search, data structures, math, sortings

Not Escaping

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

Staircases

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

Pattern Matching

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

Statistics of Recompressing Videos

*special problem, data structures, implementation

Shark

brute force, data structures, dsu, trees

Leha and another game about graph

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

Removing Leaves

data structures, greedy, implementation, trees

Dense Subsequence

data structures, greedy, strings

Maxim and Array

constructive algorithms, data structures, greedy, math

Analysis of Pathes in Functional Graph

data structures, graphs

Space Harbour

data structures, implementation, math, sortings

Hot Start Up (hard version)

data structures, dp

Army Creation

binary search, data structures

TV Shows

data structures, greedy, implementation, sortings

Magic Triples (Hard Version)

brute force, data structures, math, number theory

Felicity is Coming!

data structures, hashing, sortings, strings

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

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

Wi-Fi

data structures, dp, greedy

Driving Test

data structures, dp, greedy

Counting Shortcuts

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

Unstable String Sort

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

Permutation Separation

data structures, divide and conquer

Division + LCP (easy version)

binary search, data structures, dp, hashing, string suffix structures, strings

Rain

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

Monitor

binary search, data structures

Kill Anton

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

Qpwoeirut and Vertices

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

Handshakes

binary search, constructive algorithms, data structures, greedy

You Are Given a WASD-string...

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

Voting (Hard Version)

binary search, data structures, greedy

Lexicographically Small Enough

brute force, data structures, greedy, strings

Learning to Paint

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

MEX Queries

binary search, data structures, trees

Sereja ans Anagrams

binary search, data structures

Pinball

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