Zhora the Vacuum Cleaner

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

Al Fine (Maximizing Version)

binary search, data structures, divide and conquer, trees

Doors and Keys

brute force, data structures, dp

Jerry and Tom

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

BattleCows 2

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

Mixing MEXes

data structures, implementation, math

BattleCows

data structures, divide and conquer, implementation

OutOfMemoryError

data structures, implementation, math, two pointers

Nastiness of Segments

binary search, data structures

Exquisite Array

combinatorics, data structures, dsu, sortings

Tree Coloring (Hard Version)

combinatorics, constructive algorithms, data structures, dfs and similar, greedy, implementation, trees

Short Garland

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

Christmas Reindeer (hard version)

bitmasks, brute force, combinatorics, data structures, greedy, math

New Year's Gifts

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

Doorway

binary search, data structures, sortings

Battle of Arrays

data structures, games, greedy

Insolvable Disks

data structures, dp, greedy, math

Blackslex and Plants

bitmasks, data structures, dp, implementation, math

deCH OR Dations

bitmasks, data structures, dp, hashing, probabilities

Remove at the lowest cost

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

Fibonacci Paths

data structures, dp, graphs, sortings

Secret Message

data structures, dp, greedy, trees

Isla's Memory Thresholds

binary search, brute force, data structures, divide and conquer, math

Sliding Tiles

data structures, divide and conquer, dsu

Shiori Miyagi and Maximum Array Score

binary search, data structures, dp, sortings

Rae Taylor and Trees (hard version)

binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees

Rae Taylor and Trees (easy version)

binary search, data structures, dp, dsu, greedy, implementation, trees

Binary Strings and Blocks

combinatorics, data structures, dp

Mukhammadali and the Smooth Array

data structures, dp

khba Loves to Sleep!

binary search, data structures, geometry, greedy, implementation

Arctic Acquisition

data structures, greedy

PalindromePalindrome

data structures, strings

Chain Prefix Rank (Hard Version)

binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees

Journey

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

Dungeon

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

Cycle Sort

data structures

Locked Out

binary search, data structures, dp, greedy

Rectangles

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

Sink

data structures, divide and conquer, dsu, graphs, implementation

Adjusting Drones

binary search, brute force, data structures, dp, dsu, greedy, implementation, sortings

Strange Operation (Hard Version)

data structures, greedy, trees

Strange Operation (Easy Version)

brute force, data structures, greedy, implementation, sortings

Best Time to Buy and Sell Stock

binary search, brute force, data structures, dp, games, graphs, greedy

Juan's Colorful Tree

data structures, dfs and similar, dfs and similar, dsu, graphs, graphs, meet-in-the-middle, trees

Odd Queries on Odd Array

bitmasks, brute force, data structures, implementation, trees

Victorious Coloring (Hard Version)

data structures, greedy, schedules

Query Jungle

data structures, implementation, math, matrices, trees

Triple Attack

data structures, greedy

Triple Removal

data structures, greedy, math

Limited Edition Shop

data structures, dp

Incremental Path

data structures, hashing, implementation

Buratsuta 3

binary search, brute force, data structures, divide and conquer, probabilities

Hidden Knowledge of the Ancients

data structures, two pointers

Farmer John's Last Wish

binary search, data structures, math, number theory

Split

binary search, data structures, two pointers

Exchange Queries

combinatorics, data structures, greedy

Maximum OR Popcount

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

Yet Another MEX Problem

brute force, constructive algorithms, data structures, divide and conquer, greedy, hashing

Predicting Popularity

binary search, data structures, greedy, sortings

Looking at Towers (difficult version)

combinatorics, data structures, dp

Increasing Xor

bitmasks, data structures, math

Inversion Graph Coloring (Hard Version)

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

Inversion Graph Coloring (Easy Version)

combinatorics, data structures, dp, greedy, two pointers

Good Robot Paths

*special problem, data structures, geometry, sortings

A Cruel Segment's Thesis

data structures, greedy, sortings

Ultimate Value

data structures, games, greedy

Antiamuny Wants to Learn Swap

data structures, greedy, two pointers

Prefix Maximum Invariance

binary search, combinatorics, data structures, sortings

To the Infinity

data structures, hashing, math, trees

Against the Difference

data structures, dp

Flint and Steel

data structures, dp, graphs

Redstone?

brute force, data structures, implementation, math

Arithmetics Competition

binary search, data structures, greedy, sortings, ternary search

Wafu!

bitmasks, brute force, data structures, dfs and similar, dp, math

Unjust Binary Life

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

Arboris Contractio

data structures, graphs, greedy, trees

Induced Subgraph Queries

data structures, graphs, sortings

Stay or Mirror

brute force, data structures, dp, greedy, sortings

Submedians (Hard Version)

binary search, constructive algorithms, data structures, math, two pointers

Submedians (Easy Version)

binary search, data structures, dp, greedy, math

Ancient Tree

constructive algorithms, data structures, dfs and similar, dsu, greedy, trees

Big Wins! (hard version)

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

Big Wins! (easy version)

binary search, data structures, dp, dsu, two pointers

1-1-1, Free Tree!

brute force, data structures, dfs and similar, graphs, implementation, trees

This Is the Last Time

data structures, greedy, sortings

Maximise Sum

binary search, data structures

Modular Sorting

brute force, data structures, greedy, math, number theory, sortings

MEX Count

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

Prefix Min and Suffix Max

brute force, data structures

Traffic Lights

brute force, data structures, divide and conquer, dp, graphs, greedy, shortest paths

Ice Baby

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

Gangsta

data structures, divide and conquer, math, sortings

Yamakasi

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

Shifts and Swaps

data structures, graphs, hashing, trees

Red Light, Green Light (Hard version)

binary search, brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Make It Beautiful

bitmasks, data structures, greedy, math

Incessant Rain

data structures, divide and conquer, sortings

Cool Partition

data structures, greedy

Gellyfish and Lycoris Radiata (Hard Version)

data structures

Gellyfish and Lycoris Radiata (Easy Version)

data structures