index.md

• 16+18=214
• 21 Sticks
• 254 shades of grey
• 2D Vector Mapping
• 80's Kids #1: How Many Licks Does it Take?
• 80's Kids #2: Help ALF Find His Spaceship
• 80's Kids #3: Punky Brewster's Socks
• 80's Kids #5: You Can't Do That on Television
• A Letter's Best Friend
• A Man and his Earthly Measurement
• A Rule of Divisibility by 7
• A snail enters a bar!
• Acronym Generator
• AD2070: Help Lorimar troubleshoot his robots- ultrasonic distance analysis
• Adding values of arrays in a shifted way
• Aerial Firefighting
• Age in days
• All Inclusive?
• All Nines
• All Star Code Challenge #22
• All unique
• Alphabet symmetry
• Alphabet war
• Alphabetical Addition
• Alphabetical Sequence
• Alternate capitalization
• Alternate Square Sum
• An English Twist on a Japanese Classic
• Anagram Detection
• Another card game
• Anti-virus file scanner
• ANTISTRING
• Approaching enemies
• Are the numbers in order?
• Area of a Circle
• Area of an arrow
• Arithmetic progression
• Arithmetic Sequence!
• Array element parity
• Array Leaders (Array Series #3)
• Array - squareUp b!
• ATM
• Automorphic Number (Special Numbers Series #6)
• Averages of numbers
• Balanced Number (Special Numbers Series #1)
• Basic Calculator
• Basic Math (Add or Subtract)
• Basic Sequence Practice
• Basics - Generators #1
• Batman Quotes
• Battle of the characters (Easy)
• Beginner Series #3 Sum of Numbers
• Between Extremes
• Binary Addition
• Binary Calculator
• Binary scORe
• Binary sXORe
• Bingo (Or Not)
• Bits Battle
• Blood Moon
• Blowing Birthday Candles
• Boiled Eggs
• Breaking chocolate problem
• Broken sequence
• Bubblesort Once
• [BUG] XCOM-241: Genome mapper freezes
• Build a square
• Building blocks
• Bulls and Cows
• Bumps in the Road
• Bus mastering - Who is the most prioritary?
• C is for Codewars
• Caffeine Script
• Calculate mean and concatenate string
• Calculate the Harmonic Conjugated Point of a Triplet of Aligned Points
• Cartesian coordinates from degree angle
• Cartesian neighbors
• Cat and Mouse - Easy Version
• Cat Years, Dog Years (2)
• Cats and shelves
• Center of the Matrix
• Ch4113ng3
• Change two-dimensional array
• Changing letters
• Char Code Calculation
• Character Counter
• Check contained matrix
• Check three and two
• Check whether a number is valid in a given numeral system
• Chinese Zodiac
• Circle cipher
• Circular List
• Clean up after your dog
• Closest to Zero
• Closing in Sum
• Codewars Leaderboard Climber
• Cogs 2
• Cogs
• Collatz Conjecture Length
• Colored Hexes!
• Coloured Triangles
• Common Substrings
• Compare Strings by Sum of Chars
• Complementary DNA
• Complete The Pattern #1
• Complete The Pattern #2
• Complete The Pattern #4
• Composing squared strings
• CompoundArray
• Computer problem series #1: Fill the Hard Disk Drive
• Conference Traveller
• Consecutive Digits To Form Sum
• Consecutive letters
• Convert a linked list to a string
• Convert Time to String
• Converting from base 10 to 16! Dare you?
• Correct the time-string
• Count all the sheep on farm in the heights of New Zealand
• Count consonants
• Count the Digit
• Count the divisors of a number
• Count the Ones
• Covfefe
• Create palindrome
• Credit card issuer checking
• Credit Card Mask
• Cryptanalysis Word Patterns
• Curing Arachnophobia
• Currying functions: multiply all elements in an array
• C.Wars
• Cyclops numbers
• Cyrillic letters
• Day of the Year
• Debug Sum of Digits of a Number
• Decimal decomposition
• Decimal Time Conversion
• Decipher the Message
• Delta Bits
• Deodorant Evaporator
• Descending Order
• Describe a list
• Determine if the poker hand is flush
• Dice Rotation
• Difference between two collections
• Difference between years. (Level 1)
• Difference Of Squares
• Digital cypher vol 2
• Digital cypher
• Digitize
• Digits explosion
• Disagreeable ascii
• Disarium Number (Special Numbers Series #3)
• Disemvowel Trolls
• Don't give me five!
• Dot Calculator
• Double Every Other
• Double Sort
• Double Trouble
• Double value every next call
• Driving Licence
• Driving School Series #2
• Drone Fly-By
• Drying Potatoes
• EAN Validation
• Easy Line
• Easy wallpaper
• Elevator Distance
• Eliminate the intruders! Bit manipulation
• Email Address Obfuscator
• E.S.P. Cards
• Even numbers in an array
• Even or Odd - Which is Greater?
• Evens times last
• Excel sheet column numbers
• Excessively Abundant Numbers
• Exclamation marks series #5: Remove all exclamation marks from the end of words
• Exclamation marks series #8: Move all exclamation marks to the end of the sentence
• Execute me nTimes
• Exes and Ohs
• Extended weekends
• Extra Perfect Numbers (Special Numbers Series #7)
• Factorial
• Factorial
• Fibonacci
• Figurate Numbers #2 - Pronic Number
• Filter the number
• Find Count of Most Frequent Item in an Array
• Find Fibonacci last digit
• Find Max Tree Node
• Find min and max
• Find Screen Size
• Find sum of top-left to bottom-right diagonals
• Find the capitals
• Find the index of the second occurrence of a letter in a string
• Find the Missing Number
• Find the next perfect square!
• Find the nth occurrence of a word in a string!
• Find the smallest power higher than a given a value
• Find the Squares
• Find the stray number
• Find the sum of the roots of a quadratic equation
• Find the vowels
• Find your caterer
• Finding queens on the board
• Finding Remainder Without Using '%' Operator
• Fix string case
• FIXME: 1, 2, 3, 4
• FIXME: Get Full Name
• FIXME: Hours to Seconds
• FIXME: Let's split this joint
• FIXME: Run, Runner!
• Fizz Buzz Cuckoo Clock
• Fizz Buzz
• Fizz / Buzz
• Flatten and sort an array
• Floating-point Approximation (III)
• Folding your way to the moon
• Form The Minimum
• Formatting decimal places #1
• Four/Seven
• Friend or Foe?
• Friends
• From A to Z
• Fun with lists: anyMatch + allMatch
• Fun with lists: indexOf
• Fun with lists: lastIndexOf
• Fun with lists: length
• Functional Addition
• Functions of Integers on Cartesian Plane
• Fusion Chamber Shutdown
• GCD sum
• Geometry Basics: Dot Product in 3D
• Geometry Basics: Triangle Perimeter in 2D
• Get the Middle Character
• Ghostbusters (whitespace removal)
• Go: Stone Scoring
• Going to the cinema
• Greatest Common Divisor Bitcount
• Greatest common divisor
• Green Glass Door
• Greet Me
• Growth of a Population
• Guarding the AlgoLandia
• Guava against Million dollar error
• Guess the Sequence
• Halving Sum
• Happy Birthday 1
• Happy Birthday, Darling!
• Harvest Festival
• Hëävÿ Mëtäl Ümläüts
• Hello World - Without Strings
• Help Bob count letters and digits.
• Help Suzuki complete his chores!
• Help Suzuki rake his garden!
• Help the Fruit Guy
• Help your fellow warrior!
• Herding cats
• Heron's formula
• Hero's root
• Hide password from jdbc url
• Highest and Lowest
• Highest Value Pyramid
• Histogram - H1
• Histogram - H2
• Holiday III - Fire on the boat
• Holiday VII - Local Talk
• How far will I go?
• How Green Is My Valley?
• How long should you cook this for?
• How many arguments
• How many consecutive numbers are needed?
• How many days are we represented in a foreign country?
• How Many Streets?
• How many urinals are free?
• Hungarian Vowel Harmony (easy)
• I Will Take the Biggest One and Nothing Else
• Incrementer
• Indexed capitalization
• Infinitely Nested Radicals
• Insert dashes
• Inspiring Strings
• Integer Primitive Data Types
• Interactive Dictionary
• Interlocking Binary Pairs
• intTunes
• Invisible cubes
• Is It Negative Zero (-0)?
• Is n divisible by (...)?
• Is Sator Square?
• Is this a triangle?
• Is valid identifier?
• Isograms
• Jaden Casing Strings
• Java Functional Programming (Part 1: The Beginning)
• Java Functional Programming (Part 2: Multiline Functions)
• Java Functional Programming (Part 3: Closured for Business)
• Java: Generic Inheritance
• Jumping Number (Special Numbers Series #4)
• Keypad horror
• Kooka-Counter
• Large sum
• Largest 5 digit number in a series
• Largest Elements
• Largest pair sum in array
• Largest Square Inside A Circle
• Last Survivor
• Last
• Latin Squares
• Laxative Shot Roulette
• Leap Years
• Length and two values
• Letterbox Paint-Squad
• Likes Vs Dislikes
• Linked Lists - Append
• Linked Lists - Get Nth Node
• Linked Lists - Push & BuildOneTwoThree
• List Filtering
• Lombok Builder
• Lombok Encapsulation
• London CityHacker
• Longest vowel chain
• Looking for a benefactor
• Lost number in number sequence
• Love vs friendship
• lucky number
• Lunar Mathematics: Addition
• Make a function that does arithmetic!
• Make Me Slow
• Make Backronym
• Map over a list of lists
• Match My Husband
• Math.pow?
• Matrix Addition of Elements
• Matrix Square Up, B!
• Matrix Weight
• Max diff - easy
• Max-min arrays
• Max sum between two negatives
• Maximum Gap (Array Series #4)
• Maximum Length Difference
• Maximum Multiple
• Maximum Product
• Maximum Triplet Sum (Array Series #7)
• Mean vs. Median
• Mew Cipher
• Mind the Gap
• Minimize Sum Of Array (Array Series #1)
• Minimum Steps (Array Series #6)
• Minimum Ticket Cost
• Misleading Signs
• MOD 256 without the MOD operator
• Money, Money, Money
• Monty Hall Problem
• More than Zero?
• Most digits
• Most valuable character
• Move 10
• Moves in squared strings (I)
• Multiple implications
• Multiplication - Generators #2
• Mumbling
• My Language Skills
• Mystery Colors
• N-Dimensional Vector Magnitude
• Name Array Capping
• Name That Number!
• Nice Array
• Nickname Generator
• No ifs no buts
• Nth power rules them all!
• Nth Smallest Element (Array Series #4)
• Null
• Number of Decimal Digits
• Number of People in the Bus
• Number of Rectangles in a Grid
• Number-Star ladder
• Number to digit tiers
• Numbers in strings
• Numbers to Letters
• Numbers Which Sum of Powers of Its Digits Is The Same Number
• Numbers with d occurrences of digit d
• Numbers with this digit inside
• Odd-Even String Sort
• Odd March Bits 8 bits
• Odd or Even?
• Odder Than the Rest
• Ones and Zeros
• Ordered Count of Characters
• Ordering the words!
• ORing arrays
• Orthogonal Vectors
• O's and X's adjudicator
• Over The Road
• Overflowing with joy
• Page replacement algorithms: FIFO
• Palindrome chain length
• Pandemia 🌡️
• Parallel resistors
• Partial Word Searching
• Parts of a list
• Password maker
• Password System
• Paul's Misery
• Perimeter sequence
• Perpendicular lines
• Pizza Payments
• Plan Your Dream Wedding
• Playing Cards Draw Order – Part 1
• Plus - minus - plus - plus - ... - Count
• Point in a unit circle
• Pokerhand, straight or not?
• Possibilities Array
• Power of two
• Powers of i
• Predict your age!
• Previous multiple of three
• Principal Diagonal VS Secondary Diagonal
• Printer Errors
• Prison Break
• Product Array (Array Series #5)
• Product Of Maximums Of Array (Array Series #2)
• Product of the main diagonal of a square matrix
• Queue time counter
• Quicksum
• Recursion 101
• Red Knight
• Redacted!
• Reduce My Fraction
• Regex validate PIN code
• Regex validation of 24 hours time.
• Regexp Basics - is it a eight bit signed number?
• Regexp Basics - is it a eight bit unsigned number?
• Regexp Basics - is it a hexadecimal number?
• Regexp Basics - is it a letter?
• Regexp Basics - is it a six bit unsigned number?
• Regexp Basics - is it a vowel?
• Regexp basics - parsing prices
• Remove anchor from URL
• Remove consecutive duplicate words
• Remove duplicate words
• Remove the minimum
• Replace every nth
• Resistor Color Codes
• Responsible Drinking
• Return substring instance count
• Return the first M multiples of N
• Reverse a Number
• Reverse the bits in an integer
• Reverse words
• Reversing Fun
• Robinson Crusoe
• Robotic Tattoo Removal
• Rock Off!
• Rock Paper Scissors Lizard Spock
• Rotate for a Max
• Round up to the next multiple of 5
• Row Weights
• Running out of space
• Santa's Naughty List
• Scaling Squared Strings
• Scoring Tests
• Scrabble Score
• Scrolling Text
• Search for letters
• Sectional Array Sort
• See You Next Happy Year
• Selective fear of numbers
• Send in the Clones
• Set Reducer
• Shift Left
• Shifter words
• Shorter concat [reverse longer]
• Shortest Word
• Show multiples of 2 numbers within a range
• Simple array product
• Simple beads count
• Simple consecutive pairs
• Simple directions reversal
• Simple equation reversal
• Simple eviternity numbers
• Simple fibonacci strings
• Simple Fun #11: Swap Adjacent Bits
• Simple Fun #152: Invite More Women?
• Simple Fun #176: Reverse Letter
• Simple Fun #2: Circle of Numbers
• Simple Fun #37: House Numbers Sum
• Simple Fun #40: Timed Reading
• Simple Fun #41: Elections Winners
• Simple Fun #63: Shape Area
• Simple Fun #74: Growing Plant
• Simple Fun #9: Array Packing
• Simple letter removal
• Simple Maths Test
• Simple remove duplicates
• Simple Socket Client
• Simple string characters
• Simple string division II
• Simple string division
• Simple string reversal II
• Simple string reversal
• Single digit
• Small enough? - Beginner
• Smallest value of an array
• Smoking Timmy
• Smooth numbers
• Snail crawls up
• Sort an array by value and index
• Sort arrays - 1
• Sort by binary ones
• Sort by Last Char
• Sort deck of cards
• Sort Out The Men From Boys
• Sort the Gift Code
• Sorted? yes? no? how?
• Sorting the Odd way!
• Special Number (Special Numbers Series #5)
• Speed Control
• Speed Limit
• Split By Value
• Split In Parts
• Spoonerize Me
• Square Every Digit
• Square Pi's
• Stacked Balls - 2D
• Stacked Balls - 3D (square base)
• Stacked Balls - 3D (triangle base)
• Stanton measure
• Status Arrays
• Steps
• Stone Pickaxe Crafting
• Strange mathematics
• String ends with?
• String interlacing
• String Merge!
• String Packet Based Communications
• String prefix and suffix
• Strong Number (Special Numbers Series #2)
• Subcuboids
• Substituting Variables Into Strings: Padded Numbers
• Substring fun
• Suitcase packing
• Sum a list but ignore any duplicates
• Sum Array with different bases
• Sum of a sequence
• Sum of angles
• Sum of array singles
• Sum of Cubes
• Sum of differences between products and LCMs
• Sum of Minimums!
• Sum of numbers from 0 to N
• Sum of Odd Cubed Numbers
• Sum of odd numbers
• Sum of the first nth term of Series
• Sum of Triangular Numbers
• Sum of two lowest positive integers
• Summation Triangle #1
• Summing a number's digits
• Supernatural
• Survive the attack
• Suzuki needs help lining up his students!
• Swap pairs in Array
• Swapping Cards
• Switcheroo
• Target Date
• Ten Green Bottles
• Testing 1-2-3
• The 12 Days of Christmas
• The alphabet product
• The Baum-Sweet sequence
• The Culling of Stratholme
• The First Non Repeated Character In A String
• The fusc function -- Part 1
• The highest profit wins!
• The Hunting of the Snark
• The Nail
• The Office I - Outed
• The Office II - Boredom Score
• The Office III - Broken Photocopier
• The Office IV - Find a Meeting Room
• The old switcheroo
• The Poet And The Pendulum
• The Pony Express
• The Solar System - Jumbled Planets
• The Speed of Letters
• The 'spiraling' box
• The wheat/rice and chessboard problem
• Thinkful - Number Drills: Congo warehouses
• Thinkful - String Drills: Quotable
• Thinking & Testing: A and B?
• Thinking & Testing : Incomplete string
• Thinking & Testing : Something capitalized
• Thinking & Testing : True or False
• Thinking & Testing : Uniq or not Uniq
• Tidy Number (Special Numbers Series #9)
• ToLeetSpeak
• Treasure Hunt with Clues
• Triangle area
• Triangles from Dots
• Triangular Treasure
• Trigrams
• Trilingual democracy
• TV Remote
• Two fighters, one winner
• Two numbers are positive
• Two Oldest Ages
• Two to One
• Uglify Word
• Ultimate Array Reverser
• Unflatten a list (Easy)
• Unique string characters
• Unlucky Days
• Unusual Lex Order
• URL Timestamps
• V A P O R C O D E
• Valid Parentheses
• Valid Spacing
• Valid teams and names
• Very Even Numbers
• Visible Dots On a Die
• Vowel Count
• Waiting room
• Walking in the hallway
• WASD Movement
• What a "Classy" Song
• What is the flag?
• What's my golf score?
• Where is THB?
• Where's Wally
• Will you survive the zombie onslaught?
• Without the letter 'E'
• Word values
• You Can't Code Under Pressure #2
• You're a square!
• Zebulan's Nightmare