Reverse Madness

data structures, greedy

Clubstep

binary search, brute force, data structures, greedy, trees

Ball-Stackable

constructive algorithms, data structures, dp, trees

Data Structures Fan

binary search, bitmasks, data structures, dp

Standard Graph Problem

data structures, graphs, greedy, trees

MEXanization

data structures

Colorful Table

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

LIS?

data structures, greedy, implementation

Salyg1n and the MEX Game

constructive algorithms, data structures, games, greedy, interactive

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Grouped Carriages

binary search, data structures, dp, flows, greedy

Freak Joker Process

binary search, data structures, sortings

Exotic Queries

data structures, implementation, sortings

Guess Game

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

Matrix Cascade

brute force, constructive algorithms, data structures, dp, greedy, math

The Great Equalizer

binary search, data structures, math, sortings

Kolya and Movie Theatre

constructive algorithms, data structures, greedy

Flower City Fence

binary search, data structures, implementation, sortings

Queries for the Array

data structures, dfs and similar, implementation, strings, trees

Evaluate RBS

data structures, geometry, implementation, math, sortings

Fast Travel Text Editor

data structures, dfs and similar, graphs, shortest paths

Game on Permutation

data structures, dp, games, greedy

Teleportation in Byteland

data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees

Andrey and Escape from Capygrad

binary search, data structures, dp, dsu, greedy, sortings

Rollbacks (Hard Version)

data structures, interactive, trees

Rollbacks (Easy Version)

brute force, data structures, dfs and similar, trees

Trees and Segments

brute force, data structures, dp, greedy, two pointers

Sum and Product

binary search, data structures, math

To Become Max

binary search, brute force, data structures, dp

Panda Meetups

data structures, dp, flows

Rivalries

constructive algorithms, data structures, greedy

Ina of the Mountain

data structures, dp, greedy, math

Vlad and the Mountains

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

The Morning Star

combinatorics, data structures, geometry, implementation, math, sortings

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Max to the Right of Min

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

Binary String Copying

binary search, brute force, data structures, hashing, strings

Vika and the Bridge

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

The Boss's Identity

binary search, bitmasks, data structures, dfs and similar, greedy, math, sortings

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Rating System

binary search, brute force, data structures, dp, dsu, greedy, math, two pointers

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees

Min Cost Permutation (Hard Version)

binary search, constructive algorithms, data structures, greedy, math, sortings

Omsk Metro (hard version)

data structures, dfs and similar, divide and conquer, dp, math, trees

Omsk Metro (simple version)

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

Tracking Segments

binary search, brute force, data structures, two pointers

Tenzing and Triangle

data structures, dp, geometry, greedy, math

Fill the Matrix

data structures, greedy, math

Pairs of Segments

data structures, greedy, sortings, two pointers

Character Blocking

data structures, hashing, implementation

Ball Sorting

data structures, dp, sortings

Bracket Walk

data structures, greedy, strings

Editorial for Two

binary search, data structures, greedy, implementation

MEX of LCM

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

Survey in Class

brute force, data structures, greedy, implementation, sortings

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

The Third Grace

data structures, dp

Bully Sort

data structures, math

Hits Different

data structures, dp, implementation, math

Copium Permutation

constructive algorithms, data structures, greedy

Two Centroids

data structures, dfs and similar, greedy, trees

Palindrome Partition

binary search, brute force, data structures, dp, hashing, strings

Range Sorting (Hard Version)

binary search, data structures, dp, greedy

Walk the Runway

bitmasks, brute force, data structures, dp, graphs, implementation, sortings

LuoTianyi and Cartridge

data structures, trees

LuoTianyi and the Function

data structures

LuoTianyi and XOR-Tree

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

Magic Triples (Hard Version)

brute force, data structures, math, number theory

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Willy-nilly, Crack, Into Release!

data structures, dp

Misha and Apples

brute force, data structures, dp, two pointers

Almost Increasing Subsequence

binary search, data structures, greedy

Chain Chips

data structures, dp, matrices

Balancing Weapons

binary search, brute force, data structures, math, two pointers

Vlad and the Nice Paths (hard version)

binary search, combinatorics, data structures, dp, math, two pointers

M-tree

data structures, math, sortings, trees

Monsters

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

Traveling in Berland

binary search, data structures, graphs, greedy, implementation

Petya, Petya, Petr, and Palindromes

binary search, brute force, data structures, two pointers

Subsequence Addition (Easy Version)

brute force, data structures, dp, greedy, implementation, sortings

Odd Queries

data structures, implementation

Tree Master

brute force, data structures, dfs and similar, trees

There Should Be a Lot of Maximums

brute force, data structures, dfs and similar, dp, trees, two pointers

Place for a Selfie

binary search, data structures, geometry, math

Flow Control

data structures, dsu, implementation

A task for substrings

data structures, string suffix structures, strings

Gasoline prices

data structures, divide and conquer, dsu, hashing, trees

The way home

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

Music Festival

binary search, data structures, dp, greedy, sortings

Buying gifts

data structures, greedy, sortings

Remove Two Letters

data structures, greedy, hashing, strings

Powering the Hero (hard version)

data structures, greedy

Powering the Hero (easy version)

data structures, greedy

Hot Start Up (hard version)

data structures, dp

Recent Actions

data structures, greedy, implementation, math

Three Sevens

brute force, data structures, greedy, implementation

Li Hua and Path

data structures, dfs and similar, divide and conquer, dsu, trees

Li Hua and Array

brute force, data structures, dsu, math, number theory, two pointers