Berzerk

dfs and similar, dp, games

Divisors

interactive, math, number theory

Work Group

dfs and similar, dp, graphs, strings, trees

Iahub and Permutations

combinatorics, math

Ant on the Tree

constructive algorithms, dfs and similar, trees

Learning to Paint

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

TV Shows

data structures, greedy, implementation, sortings

Underground Lab

constructive algorithms, dfs and similar, graphs

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Cipher

combinatorics, dp

Weird journey

combinatorics, constructive algorithms, dfs and similar, dsu, graphs

Subway Pursuit

binary search, interactive, probabilities

Candy Box (hard version)

greedy, implementation, sortings

Candy Party (Hard Version)

bitmasks, constructive algorithms, dp, greedy, implementation, math

Unusual Minesweeper

binary search, dfs and similar, dsu, greedy, sortings

Analysis of Pathes in Functional Graph

data structures, graphs

Running Track

dp, greedy, strings, trees

Maxim and Array

constructive algorithms, data structures, greedy, math

Hot Start Up (hard version)

data structures, dp

Sand Fortress

binary search, constructive algorithms, math

Neko and Aki's Prank

dp, greedy, trees

Leha and another game about graph

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

Space Harbour

data structures, implementation, math, sortings

Staircases

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

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Om Nom and Candies

brute force, greedy, math

Copy of a Copy of a Copy

constructive algorithms, dfs and similar, graphs, implementation, sortings

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Multi-Colored Segments

binary search, data structures, math, sortings

Cartons of milk

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

Rain and Umbrellas

dp

The Harmonization of XOR

bitmasks, constructive algorithms, greedy, math

Mashmokh and Reverse Operation

combinatorics, divide and conquer

Ball Sorting

data structures, dp, sortings

Well played!

greedy, sortings

Industrial Nim

games

Treasure Hunting

binary search, dp, greedy, implementation

Wrong Answer

constructive algorithms

Anya and the Mysterious String

binary search, data structures

Ralph and Mushrooms

dp, graphs

Fedor and coupons

binary search, data structures, greedy, sortings

Vitaly and Cycle

combinatorics, dfs and similar, graphs, math

Turtle Mission: Robot and the Earthquake

dfs and similar, dp, graphs, shortest paths

Interactive LowerBound

brute force, interactive, probabilities

Area of Two Circles' Intersection

geometry

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

An overnight dance in discotheque

dfs and similar, dp, geometry, greedy, trees

Infinite Maze

dfs and similar, graphs

Autosynthesis

constructive algorithms, dfs and similar, graphs, greedy, sortings

Polygons

geometry, sortings

Array and Segments (Hard version)

data structures, implementation

The Queue

brute force, greedy

Yaroslav and Time

binary search, graphs, shortest paths

Random Task

binary search, bitmasks, combinatorics, dp, math

Roma and Poker

dp, graphs

Towers

dp, greedy, two pointers

The Holmes Children

math, number theory

Spaceship Solitaire

data structures, greedy, implementation

World Tour

graphs, shortest paths

Greedy Arkady

math

Information Graph

dfs and similar, dsu, graphs, trees

Yaroslav and Two Strings

combinatorics, dp

Ithea Plays With Chtholly

binary search, constructive algorithms, games, greedy, interactive

PLEASE

combinatorics, dp, implementation, math, matrices

Cut Substrings

combinatorics, dp, hashing, strings, two pointers

Apple Tree

dfs and similar, number theory, trees

The way home

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

Microtransactions (hard version)

binary search, greedy, implementation

Maximal Area Quadrilateral

brute force, geometry

Lengthening Sticks

combinatorics, implementation, math

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Lipshitz Sequence

data structures, math

Stripe 2

binary search, dp, sortings

Let's Play the Hat?

brute force, constructive algorithms, greedy, math

Cloud Computing

data structures, greedy

Sums of Digits

dp, greedy, implementation

Permutation Sorting

data structures, sortings

Post Lamps

brute force, greedy

Messenger

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

Helga Hufflepuff's Cup

dp, trees

Arpa and a list of numbers

implementation, number theory

Field expansion

brute force, dp, meet-in-the-middle

Time to Raid Cowavans

brute force, data structures, sortings

Check Transcription

brute force, data structures, hashing, strings

Down or Right

constructive algorithms, interactive, matrices

Dima and Containers

constructive algorithms, greedy, implementation

Another Wine Tasting Event

combinatorics, constructive algorithms, math, strings

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Assimilation IV

combinatorics, dp, math, probabilities, two pointers

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Two out of Three

dp

Solo mid Oracle

greedy, math, ternary search

National Property

2-sat, dfs and similar, graphs, implementation

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Vlad and the Nice Paths (easy version)

combinatorics, dp, math

The hat

binary search, interactive

Castle Defense

binary search, data structures, greedy, two pointers

Dasha and Puzzle

constructive algorithms, dfs and similar, graphs, greedy, trees

Lucky Subsequence

combinatorics, dp, math

A Determined Cleanup

math