Telepanting

binary search, data structures, dp, sortings

Great Vova Wall (Version 2)

data structures, implementation

Guess the K-th Zero (Hard version)

binary search, constructive algorithms, data structures, interactive

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Sausage Maximization

bitmasks, data structures, trees

Three Sequences

constructive algorithms, data structures, greedy, math

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

Non-Decreasing Dilemma

data structures, divide and conquer, math

Duff in the Army

data structures, trees

Almost Difference

data structures, math

Cleaning

data structures, dp, greedy, math

The Bakery

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

Discrete Centrifugal Jumps

data structures, dp, graphs

Erase and Extend (Hard Version)

binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers

Clear the Multiset

data structures, divide and conquer, dp, greedy

XOR and Favorite Number

data structures

Circular RMQ

data structures

Powerful array

data structures, implementation, math, two pointers

Автобус

binary search, data structures, greedy, sortings

Significant Cups

*special problem, binary search, data structures, two pointers

Segments

data structures

Zigzag

data structures

Optimizer

data structures, greedy, sortings

Diverging Directions

data structures, dfs and similar, trees

Parade

data structures, sortings

Fools and Foolproof Roads

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

Hostname Aliases

*special problem, binary search, data structures, implementation, sortings, strings

Maximize The Value

data structures, sortings

Little Elephant and Shifts

data structures

Inna and Binary Logic

binary search, bitmasks, data structures

Field Photography

bitmasks, data structures, sortings

Maximum Questions

data structures, dp, strings

Getting Deals Done

binary search, data structures

Longest Array Deconstruction

data structures, divide and conquer, dp, sortings

Trip to Saint Petersburg

data structures

Performance Review

data structures

Boredom

data structures

Mahmoud and Ehab and the function

binary search, data structures, sortings

Counter Attack

data structures, dsu, graphs, hashing, sortings

Santa Claus and Tangerines

binary search, data structures, greedy, two pointers

Grouped Carriages

binary search, data structures, dp, flows, greedy

Cactus

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

Little Girl and Problem on Trees

data structures, graphs, trees

Letters Removing

data structures, strings

Beard Graph

data structures, dsu, trees

DNA Evolution

data structures, strings

Colorful Points

data structures, greedy, implementation

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

Order book

combinatorics, data structures, greedy

Broken BST

data structures, dfs and similar

Addition Robot

data structures, math, matrices

Santa Claus and a Palindrome

constructive algorithms, data structures, greedy

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Check Transcription

brute force, data structures, hashing, strings

Messenger

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

Time to Raid Cowavans

brute force, data structures, sortings

Permutation Sorting

data structures, sortings

Lipshitz Sequence

data structures, math

Infinite Inversions

binary search, data structures, implementation, sortings, trees

The way home

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

Spaceship Solitaire

data structures, greedy, implementation

Array and Segments (Hard version)

data structures, implementation

Fedor and coupons

binary search, data structures, greedy, sortings

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Ball Sorting

data structures, dp, sortings

Cartons of milk

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

Staircases

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

Leha and another game about graph

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

Space Harbour

data structures, implementation, math, sortings

Hot Start Up (hard version)

data structures, dp

Analysis of Pathes in Functional Graph

data structures, graphs

Lunar New Year and Red Envelopes

data structures, dp

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

Learning to Paint

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

Rain

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

You Are Given a WASD-string...

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

Range Deleting

binary search, combinatorics, data structures, two pointers

Guess Game

bitmasks, data structures, games, math, probabilities, sortings, strings, trees

Count Binary Strings

data structures, dp

Editor

data structures, implementation

Hossam and (sub-)palindromic tree

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

Promising String (hard version)

data structures, implementation, math, strings

Pathwalks

data structures, dp, graphs

Array Collapse

data structures, divide and conquer, dp, trees

Portals

data structures, dp, greedy, implementation, sortings

OpenStreetMap

data structures, two pointers

Funny Substrings

data structures, hashing, implementation, matrices, strings

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Beautiful Subarrays

data structures, divide and conquer, strings, trees

Pictures with Kittens (hard version)

data structures, dp

New Year and Conference

binary search, data structures, hashing, sortings

Skyline Photo

data structures, divide and conquer, dp

Monsters

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

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Number of Components

combinatorics, data structures, dp, math

MEX vs DIFF

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