Far Cities

interactive, trees, two pointers

Carrot Chopdown (Hard Version)

brute force, greedy, implementation, math

Bermuda Rectangle

binary search, implementation, math, number theory, two pointers

A Ribbon for Tomorrow

combinatorics, math

Two Digit Strings

dp, strings

Fair and Square

combinatorics, dp, graphs, math, number theory, trees

Decidophobia

greedy, math, sortings, two pointers

Fullmetal Bitchemist

constructive algorithms, greedy, math

Seating Arrangement (Hard Version)

binary search, binary search, binary search, greedy, greedy, greedy, math, two pointers

Cirno and Number (Hard Version)

binary search, dfs and similar, dp, greedy, implementation

Zhily and Barknights

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

Where's My Water?

data structures, divide and conquer, dp, math

One Night At Freddy's

games, greedy, sortings

Minesweeper

*special problem, constructive algorithms, greedy

Another Problem about Beautiful Pairs

brute force, math, two pointers

Table Cut

constructive algorithms, greedy, implementation

Pizza Delivery

dp, greedy

Unfair Game

combinatorics, dp, math

Christmas Tree Decoration

combinatorics, dp, greedy, math

Fragmented Nim

games

Cluster Computing System

graphs, greedy, math

Rae Taylor and Trees (hard version)

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

Mukhammadali and the Smooth Array

data structures, dp

Tree, TREE!!!

dfs and similar, dp, math, trees

khba Loves to Sleep!

binary search, data structures, geometry, greedy, implementation

Beautiful Palindromes

constructive algorithms, greedy, schedules

Billion Players Game

binary search, greedy, math, sortings, ternary search, two pointers

The Ancient Wizards' Capes

brute force, greedy, implementation

From 1 to Infinity

binary search, dp, implementation, math

Stay or Mirror

brute force, data structures, dp, greedy, sortings

Sum of LDS

brute force, combinatorics, dp, greedy, math

Segments Covering

dp, math, probabilities

Lost Soul

brute force, greedy

Median Splits

binary search, greedy, implementation, sortings

Trulimero Trulicina

constructive algorithms

Serval and The Formula

bitmasks, constructive algorithms, dp, greedy

Arcology On Permafrost

binary search, brute force, constructive algorithms, greedy, math

Floor or Ceil

brute force, greedy

Empty Triangle

geometry, interactive, probabilities

Tree Jumps

dfs and similar, dp, trees

Skibidus and Rizz

constructive algorithms, greedy, strings

Remove Exactly Two

brute force, data structures, dfs and similar, dp, graphs, greedy, sortings, trees

Kevin and Numbers

bitmasks, data structures

Kevin and Puzzle

2-sat, combinatorics, dp

Customer Service

brute force, constructive algorithms, graph matchings, greedy, math, sortings

Adrenaline Rush

constructive algorithms

Best Price

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

Kevin and Competition Memories

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

Move Back at a Cost

binary search, data structures, greedy, sortings

Sums on Segments

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

Ordered Permutations

bitmasks, combinatorics, constructive algorithms, greedy, math, two pointers

Kachina's Favorite Binary String

dp, greedy, interactive, two pointers

Reverse the Rivers

binary search, constructive algorithms, data structures, greedy

Darius' Wisdom

constructive algorithms, greedy, implementation, sortings

Alice's Adventures in Cutting Cake

binary search, dp, greedy, two pointers

Cards Partition

2-sat, brute force, greedy, implementation, math

Colored Portals

binary search, brute force, data structures, graphs, greedy, implementation, shortest paths

Decode

combinatorics, data structures, implementation, math

Hungry Games

binary search, dp, two pointers

D-Function

combinatorics, math, number theory

Permutation of Rows and Columns

constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings

Elections

data structures, greedy, implementation, math

Job Interview

binary search, dp, greedy, implementation, two pointers

Circle Perimeter

binary search, brute force, dfs and similar, geometry, implementation, math

Cells Arrangement

constructive algorithms

Staircase

*special problem

How Does the Rook Move?

combinatorics, dp, math

Nene's Magical Matrix

constructive algorithms, greedy, math

Tree Cutting

binary search, dp, greedy, implementation, trees

Rudolf and k Bridges

binary search, data structures, dp, two pointers

Pho Restaurant

Final Countdown

implementation, math, number theory

Physical Education Lesson

brute force, math, number theory

Eat the Chip

brute force, games, greedy, math

Partitioning the Array

brute force, math, number theory

Watering an Array

brute force, greedy, implementation, math

Poisonous Swamp

*special problem, *special problem, implementation, implementation

Security Guard

*special problem, greedy

Good Triples

brute force, combinatorics, number theory

Set To Max (Easy Version)

brute force, constructive algorithms, greedy

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Decreasing String

implementation, strings

Reverse Madness

data structures, greedy

Jellyfish and Mex

dp

Kolya and Movie Theatre

constructive algorithms, data structures, greedy

Queries for the Array

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

Sum and Product

binary search, data structures, math

To Become Max

binary search, brute force, data structures, dp

Binary String Copying

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

Tracking Segments

binary search, brute force, data structures, two pointers

Character Blocking

data structures, hashing, implementation

Round Dance

dfs and similar, dsu, graphs, shortest paths

Hits Different

data structures, dp, implementation, math

Making Anti-Palindromes

greedy, math, strings

Umka and a Long Flight

constructive algorithms, implementation, math

Sequence Master

brute force, constructive algorithms, math

The Very Beautiful Blanket

bitmasks, constructive algorithms

Shocking Arrangement

constructive algorithms, greedy, math

Li Hua and Chess

constructive algorithms, greedy, interactive

Maximum Set

binary search, math