Counting Is Not Fun (Easy Version)

combinatorics, data structures, dfs and similar, dp, dsu, implementation, math

Kevin and Teams

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and Binary String (Hard Version)

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and Binary String (Easy Version)

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and And

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and Numbers

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and Puzzle

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and Geometry

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Kevin and Arithmetic

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, dfs and similar, divide and conquer, dp, dsu, expression parsing, fft, flows, games, geometry, graph matchings, graphs, greedy, hashing, implementation, interactive, math, matrices, meet-in-the-middle, number theory, probabilities, schedules, shortest paths, sortings, string suffix structures, strings, ternary search, trees, two pointers

Gifts Order

data structures, greedy, implementation, math, matrices

Find the Permutation

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

Scarecrow

greedy, implementation, math

Delicate Anti-monotonous Operations

constructive algorithms, implementation

Earnest Matrix Complement

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

Geometric Balance

data structures, geometry, implementation

Joker

brute force, greedy, implementation, math

Preparing for the Exam

constructive algorithms, implementation

Three Strings

dp, implementation, strings

Line Breaks

implementation

MEX OR Mania

bitmasks, brute force, data structures, dsu, implementation

Broken Queries

binary search, bitmasks, brute force, constructive algorithms, implementation, interactive

MEX Cycle

brute force, constructive algorithms, greedy, implementation

pspspsps

brute force, constructive algorithms, graph matchings, implementation

MEX Destruction

greedy, implementation

Kevin and Math Class

brute force, data structures, divide and conquer, dp, implementation, math, trees

Kevin and Binary Strings

bitmasks, brute force, greedy, implementation, strings

Kevin and Combination Lock

brute force, greedy, implementation, math, number theory

Alyona and a Square Jigsaw Puzzle

implementation, math

Yandex Cuneiform (Hard Version)

constructive algorithms, data structures, greedy, implementation

Cheops and a Contest (Hard Version)

greedy, implementation

Mirror Maze

brute force, dfs and similar, graphs, implementation

Hard Demon Problem

constructive algorithms, data structures, dp, implementation, math

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

Insane Problem

binary search, greedy, implementation, math, number theory

Normal Problem

implementation, strings

Problem with Queries

brute force, data structures, implementation

Nim

bitmasks, brute force, combinatorics, dp, games, greedy, implementation, shortest paths

Matrix Transformation

bitmasks, brute force, data structures, dfs and similar, graphs, greedy, implementation

Two Subarrays

data structures, dp, implementation, matrices

Vertex Pairs

binary search, brute force, data structures, dfs and similar, divide and conquer, greedy, implementation, trees

Recommendations

data structures, implementation, sortings, two pointers

Auto Complete

binary search, data structures, hashing, implementation, sortings, strings, trees

The Bento Box Adventure

implementation, sortings

Cool Swap Walk (Hard Version)

constructive algorithms, constructive algorithms, constructive algorithms, implementation, sortings

Cool Swap Walk (Easy Version)

constructive algorithms, implementation, sortings

Shohag Loves Inversions

combinatorics, dp, implementation, math

Shohag Loves Strings

constructive algorithms, greedy, implementation, strings

Fixing the Expression

implementation

Royal Flush

dp, implementation

Waiting for...

greedy, implementation

Guess One Character

constructive algorithms, implementation, interactive

Divide OR Conquer

binary search, bitmasks, data structures, dp, implementation

Intercepted Inputs

brute force, implementation

Twice

implementation

I Love 1543

brute force, implementation, matrices

Anya and 1100

brute force, implementation

Quintomania

implementation

Monster

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

Yet Another Real Number Problem

binary search, data structures, divide and conquer, greedy, implementation, math

Sliding

implementation, math

Simurgh's Watch (Hard Version)

greedy, implementation

Simurgh's Watch (Easy Version)

constructive algorithms, greedy, implementation, sortings

Darius' Wisdom

constructive algorithms, greedy, implementation, sortings

Trapped in the Witch's Labyrinth

constructive algorithms, dfs and similar, graphs, implementation

Rakhsh's Revival

data structures, greedy, implementation, two pointers

Sakurako and Kosuke

constructive algorithms, implementation, math

Balanced

constructive algorithms, data structures, greedy, implementation, math

Genokraken

constructive algorithms, data structures, graphs, greedy, implementation, interactive, trees, two pointers

Medians

constructive algorithms, greedy, implementation, math

Circuit

greedy, implementation, math, number theory

Penchick and Chloe's Trees

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

Penchick and Desert Rabbit

binary search, data structures, dfs and similar, dp, dsu, greedy, implementation, two pointers

Orangutan Approved Subarrays

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

MEXimize the Score

combinatorics, data structures, dp, greedy, implementation, math

QED's Favorite Permutation

data structures, implementation, sortings

Alice's Adventures in Addition

bitmasks, brute force, dp, implementation

Alice's Adventures in Cards

constructive algorithms, data structures, dp, graphs, greedy, implementation, ternary search

Alice's Adventures in Permuting

binary search, implementation, math

Alice's Adventures in ''Chess''

brute force, implementation, math

The Endspeaker (Hard Version)

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

The Endspeaker (Easy Version)

binary search, dp, graphs, greedy, implementation, two pointers

Rectangle Arrangement

geometry, implementation, math

Bermart Ice Cream

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

Sums of Segments

binary search, data structures, dp, implementation, math

Action Figures

binary search, brute force, constructive algorithms, data structures, greedy, implementation

Attribute Checks

brute force, data structures, dp, implementation, math, two pointers

New Game

binary search, brute force, greedy, implementation, sortings, two pointers

C+K+S

constructive algorithms, dfs and similar, graphs, greedy, hashing, implementation, strings

Asesino (Easy Version)

binary search, brute force, constructive algorithms, implementation, interactive

Gerrymandering

dp, implementation

Bus to Pénjamo

constructive algorithms, greedy, implementation, math

Digital Village (Easy Version)

brute force, data structures, dfs and similar, dp, dsu, fft, graphs, greedy, implementation, math, trees

Boss, Thirsty

dp, greedy, implementation

Adjust The Presentation (Hard Version)

constructive algorithms, data structures, greedy, implementation, sortings

Bitwise Balancing

bitmasks, hashing, implementation, math, schedules, ternary search

All Pairs Segments

implementation, math

Max Plus Min Plus Size

data structures, dp, dsu, greedy, implementation, matrices, sortings

Speedbreaker

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

Cards Partition

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