Sports Betting

2-sat, brute force, math, sortings

Wonderful City

dp, implementation

La Vaca Saturno Saturnita

binary search, brute force, math, number theory

Chimpanzini Bananini

data structures, implementation, math

Trulimero Trulicina

constructive algorithms

Shorten the Array

binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers

Hackers and Neural Networks

bitmasks, brute force, greedy

Min Max MEX

binary search, brute force, greedy

Skibidi Table

bitmasks, implementation

Mishkin Energizer

brute force, constructive algorithms, greedy, implementation, strings

Igor and Mountain

binary search, brute force, dp

Interesting Ratio

brute force, math, number theory, two pointers

Dining Hall

data structures, greedy, implementation, sortings

Canteen (Easy Version)

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

Simple Permutation

constructive algorithms, number theory

Even String

brute force, combinatorics, dp, math, strings

Disappearing Permutation

dfs and similar, dp, dsu, graphs, greedy, implementation

Serval and The Formula

bitmasks, constructive algorithms, dp, greedy

Arcology On Permafrost

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

You Soared Afar With Grace

constructive algorithms, data structures, greedy, implementation

Floor or Ceil

brute force, greedy

Math Division

bitmasks, dp, math, probabilities

Best Runner

*special problem

Cute Subsequences

*special problem, sortings

Scammy Game Ad

dp, greedy, implementation

Finding OR Sum

bitmasks, constructive algorithms, implementation, interactive, math

Breach of Faith

constructive algorithms, greedy, math, sortings

Two Colors

binary search, combinatorics, math

Array Recoloring

constructive algorithms, greedy

Empty Triangle

geometry, interactive, probabilities

Counting Points

brute force, data structures, geometry, implementation, two pointers

Boarding Queue

Control Towers

Goodbye, Banker Life

2-sat, bitmasks, combinatorics, constructive algorithms, fft, math, number theory

Do You Love Your Hero and His Two-Hit Multi-Target Attacks?

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

For Wizards, the Exam Is Easy, but I Couldn't Handle It

brute force, greedy, implementation

Infinite Sequence (Easy Version)

bitmasks, brute force, dp, implementation, math

Trapmigiano Reggiano

constructive algorithms, data structures, dfs and similar, dp, greedy, sortings, trees

Tree Jumps

dfs and similar, dp, trees

Limited Repainting

binary search, greedy

Palindrome Shuffle

binary search, greedy, hashing, strings, two pointers

Beautiful Sequence

combinatorics, dp, greedy, two pointers

Mascot Naming

brute force, greedy, implementation, strings

Devyatkino

brute force, dfs and similar, greedy, math

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Object Identification

graphs, greedy, implementation, interactive

Skibidus and Capping

combinatorics, math, number theory

Skibidus and Slay

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

Skibidus and Rizz

constructive algorithms, greedy, strings

Skibidus and Fanum Tax (hard version)

binary search, greedy

Eating

binary search, bitmasks, brute force, data structures, dp, greedy, trees, two pointers

Remove the Ends

brute force, constructive algorithms, dp, greedy

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

Graph Composition

dfs and similar, dsu, graphs, greedy

Graph and Graph

data structures, graphs, greedy, shortest paths

Customer Service

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

Cost of the Array

brute force, constructive algorithms, greedy, math

Trip to the Olympiad

bitmasks, constructive algorithms, greedy, math

Find the Permutation

brute force, dfs and similar, graphs, implementation, sortings

The Trail

brute force, constructive algorithms, greedy, math, two pointers

Resourceful Caterpillar Sequence

dfs and similar, dp, games, graphs, greedy, trees

Refined Product Optimality

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

Bewitching Stargazer

bitmasks, divide and conquer, dp, math

Fix Flooded Floor

constructive algorithms, dp, graphs

Expression Correction

brute force, expression parsing, strings

Adrenaline Rush

constructive algorithms

Best Price

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

Tree Destruction

dfs and similar, dp, trees

Maximum modulo equality

data structures, divide and conquer, math, number theory

Three Strings

dp, implementation, strings

Digital string maximization

brute force, greedy, math, strings

Shift + Esc

brute force, dp

MEX Cycle

brute force, constructive algorithms, greedy, implementation

pspspsps

brute force, constructive algorithms, graph matchings, implementation

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

Mirror Maze

brute force, dfs and similar, graphs, implementation

Saraga

greedy, strings

Scrambled Scrabble

brute force, greedy

Medium Demon Problem (hard version)

dfs and similar, dp, dsu, graphs, implementation, trees

Medium Demon Problem (easy version)

dfs and similar, graph matchings, graphs, implementation, trees

Easy Demon Problem

binary search, brute force, data structures, math, number theory

Insane Problem

binary search, greedy, implementation, math, number theory

Problem about GCD

brute force, flows, math, number theory

Sums on Segments

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

Recommendations

data structures, implementation, sortings, two pointers

Competitive Fishing

greedy

Drunken Maze

brute force, dfs and similar, graphs, shortest paths

The Bento Box Adventure

implementation, sortings

Non Prime Tree

brute force, constructive algorithms, dfs and similar, greedy, number theory, trees, two pointers

Ordered Permutations

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

Shohag Loves GCD

constructive algorithms, greedy, math, number theory

Shohag Loves XOR (Hard Version)

bitmasks, brute force, math, number theory

Bridge Renovation

brute force, dp, greedy, math, two pointers

Guess One Character

constructive algorithms, implementation, interactive

DIY

data structures, geometry, greedy, sortings

Bonus Project

games, greedy

Kachina's Favorite Binary String

dp, greedy, interactive, two pointers