AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Different Arrays

brute force, dp, implementation

Maximize the Remaining String

brute force, data structures, dp, greedy, strings

Array Queries

brute force, data structures, dp

Exact Change

brute force, constructive algorithms, greedy

Number With The Given Amount Of Divisors

brute force, dp, number theory

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Replace With Product

brute force, greedy, math

Masha-forgetful

brute force, constructive algorithms, dp, hashing, implementation, strings

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Moving Dots

binary search, brute force, combinatorics, math, two pointers

Fixed Points

binary search, brute force, dp

Small GCD

bitmasks, brute force, dp, math, number theory

Edge Split

brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees

DZY Loves Modification

brute force, data structures, greedy

Captain Marmot

brute force, geometry

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Roman Digits

brute force, combinatorics, dp, greedy, math

Kirk and a Binary String (easy version)

brute force, greedy, strings

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Sum Graph

brute force, constructive algorithms, graphs, implementation, interactive, shortest paths, trees

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Petr#

brute force, data structures, hashing, strings

Fibonacci-ish

brute force, dp, hashing, implementation, math

Multicolored Markers

binary search, brute force, math, number theory

Polycarp and Snakes

brute force, implementation

Freedom of Choice

brute force, greedy, implementation

Messages

brute force, dp, greedy, probabilities, sortings

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Om Nom and Candies

brute force, greedy, math

Interactive LowerBound

brute force, interactive, probabilities

Let's Play the Hat?

brute force, constructive algorithms, greedy, math

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Twisted Circuit

*special problem, brute force, implementation

Restore Cube

brute force, geometry

Ants

brute force, implementation

Restoring Increasing Sequence

binary search, brute force, greedy, implementation

New Year Letter

bitmasks, brute force, dp

Sofa Thief

brute force, implementation

Something with XOR Queries

brute force, interactive, probabilities

Dynamic Problem Scoring

brute force, greedy

Circle of Numbers

brute force, dfs and similar, implementation

Journey

brute force, constructive algorithms, implementation

Seller Bob

brute force, dp, greedy

Xor

brute force

Beautiful IP Addresses

brute force

Log Stream Analysis

binary search, brute force, implementation, strings

Table with Letters - 2

brute force, two pointers

Special Grid

brute force, dp, greedy

Collisions

brute force, implementation, math

Mad Joe

brute force

Omkar and Circle

brute force, dp, games, greedy

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Remainder Problem

brute force, data structures, implementation

Xor-Paths

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

Binary Median

binary search, bitmasks, brute force, constructive algorithms

Nearest Beautiful Number (hard version)

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy

Reducing Delivery Cost

brute force, graphs, shortest paths

Segment Intersections

brute force, greedy, implementation, math

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Martial Arts Tournament

binary search, brute force, greedy, math

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Divisibility by 25

brute force, greedy

Longest Subsequence

brute force, math, number theory

Recovering BST

brute force, dp, math, number theory, trees

Permutation Shift

brute force, combinatorics, constructive algorithms, dfs and similar, dsu, graphs, math

Best Pair

binary search, brute force, implementation

Timofey and Black-White Tree

brute force, dfs and similar, divide and conquer, graphs, greedy, math, shortest paths, trees

MEX vs DIFF

binary search, brute force, constructive algorithms, data structures, greedy, two pointers

Vasya and Beautiful Arrays

brute force, dp, number theory

Monsters

brute force, data structures, dfs and similar, dsu, graphs, greedy

New Year's Puzzle

brute force, dp, graph matchings, greedy, sortings

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

The LCMs Must be Large

bitmasks, brute force, constructive algorithms, math, number theory

Speedrun

brute force, dfs and similar, dp, graphs, greedy, math, sortings, two pointers

Hossam and (sub-)palindromic tree

brute force, data structures, dfs and similar, dp, strings, trees

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

String

brute force, constructive algorithms, hashing, implementation, string suffix structures, strings

Sheikh (Hard Version)

binary search, bitmasks, brute force, greedy, implementation, two pointers

Grime Zoo

brute force, greedy, implementation, strings

You Are Given a WASD-string...

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

Rain

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

Staircases

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

Rearrange Brackets

brute force, dp, greedy, sortings, strings

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

The Queue

brute force, greedy

Maximal Area Quadrilateral

brute force, geometry

Post Lamps

brute force, greedy

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

Characteristics of Rectangles

binary search, bitmasks, brute force, implementation, sortings

Two Pizzas

bitmasks, brute force

Topforces Strikes Back

brute force, math, sortings