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List of Python Kata to Update

saudiGuy11 edited this page May 4, 2024 · 754 revisions
  • Python 3.8 List of kata stuck in Python 3.8. Should be prioritized so we can get rid of the older version. Note that updating to decorator syntax is not required.
  • Python 3.10 List of kata stuck in Python 3.10.
  • Update to decorator syntax List of kata not using the new decorator syntax.

NOTE: Simply remove the kata from the list after updating.

Python 3.8

This section lists kata that failed to update to Python 3.10 or 3.11 automatically.

  1. Create a one-liner FTP client with the ftplib
  2. Find Ends of Each Paths
  3. One Line Task: Zero Or One
  4. The Messenger's Oracle

Python 3.10

This section lists kata that failed to update to Python 3.11 from 3.10 automatically or was created with Python 3.10 after the attempt.

  1. Big Big Big Padovan Number
  2. Big Generalized Fibonacci numbers
  3. Byte me!
  4. Calculate k-th digit of π (Pi)
  5. Convergents of e
  6. Data mining #2
  7. Fabergé Easter Eggs crush test
  8. Fibonacci With a Broken Interpreter
  9. How many double digits?
  10. I said the word WOULD instead of WOULDN'T
  11. Last digits of N^2 == N
  12. Matrix Exponentiation
  13. Micro Optimization: Digit Sum
  14. Next smaller pronic
  15. Number Decoding
  16. Pack Some Chocolates
  17. Pandas Series 103: Filter Rows From DataFrames That Don't Satisfy Condition
  18. Perimeter of squares in a rectangle
  19. pipi Numbers!
  20. Planning a city quarantine
  21. Reverse a singly-linked list
  22. Shuffle It Up II
  23. Squares sequence
  24. Sum of all numbers with the same digits (performance edition)
  25. Sum of certain products II
  26. Time Is Money (number of operations)
  27. Validate FEN notation
  28. Web Polygons
  29. Wordle! Cheat bot

Test Framework

This section lists Python kata without @test.it in submission tests. This doesn't prevent Python 3.8 upgrade, but we'll be able to make the test framework behave less awkwardly if we can update all kata to the new syntax.

  1. [Code War] The Weapon Factory: Assembly Line
  2. #3 Matrices: Rearrange the matrix
  3. #6 Matrices: How Many Matrices Do These Elements Produce?
  4. 2 Arrays 1 Sort
  5. 3-2-1 Fire!
  6. 3D Cellular Neighbourhood
  7. 3D Sudoku Builder (a.k.a. multisize skyscraper puzzle)
  8. 4 By 4 Skyscrapers
  9. 5x5 Nonogram Solver
  10. A Crazy Robot? Who's is behind the scenes to make that?
  11. A Python iterator for people scared of Exceptions.
  12. A Simple Music Encoder
  13. A1 Thick and Hearty
  14. AD2070: Help Lorimar troubleshoot his robots-Search and Disable
  15. Adding words - Part I
  16. Adding words - Part II
  17. ADFGX Simplified
  18. AdFly Encoder and Decoder
  19. Airport Arrivals/Departures - #1
  20. Alex & snooker: points earned.
  21. Alex & snooker: scores.
  22. Algebraic Lists
  23. Algorithm Fun: Find The Unknown Number - Part I
  24. All divisors of large numbers
  25. All Star Code Challenge #31
  26. All that is open must be closed...
  27. Alpha to Numeric and Numeric to Alpha
  28. Amidakuji
  29. An Introduction to DocTesting...
  30. Angle between two planes
  31. Answer the students' questions!
  32. Apparently-Modifying Strings
  33. Apply offset to subtitles
  34. Approximate Fractions
  35. Approximate solution of differential equation with Runge-Kutta 4
  36. Are they really equals ?
  37. Are the numbers in order?
  38. Are you available?
  39. Are you Geometric or Arithmetic? No, I´m both of them.
  40. Area of a Shape
  41. Arithmetic Expression Placeholders
  42. Arithmetic Progression of Primes
  43. Arithmetic Sequence - find hidden
  44. Arithmetic Sequence!
  45. Array Hyperrectangularity
  46. Array Info
  47. Array reduction
  48. Array to HTML table
  49. Arrays of cats and dogs
  50. ASCII Cipher
  51. ASCII Logo Basic
  52. ASCII85 Encoding & Decoding
  53. Assembling a Circular Genome (Shortest Common Superstring)
  54. Assorted Rectangular Pieces Puzzle
  55. Asyncio - The Beginning
  56. ATM money counter
  57. Author Disambiguation: a name is a Name!
  58. Author Disambiguation: Signatures worth it
  59. Author Disambiguation: to the point
  60. Averaging in an Infinite Array
  61. Avoid trillion years of calculations !!
  62. Bad Apples
  63. Bad Exception Handling
  64. Balance the parentheses
  65. Balanced parentheses string
  66. Base Conversion
  67. Base Reduction
  68. BasE91 encoding & decoding
  69. Basic Optimization - Collatz Sum Sequence
  70. Basic physics problem - Space -Kinematics
  71. Basic socket server
  72. Basic subclasses - Adam and Eve
  73. Batman Quotes
  74. Become The Ultimate Phychic
  75. Beggar Thy Neighbour
  76. Bernoulli numbers
  77. Berserk rater: CG Vs. Clang
  78. Bezier Curves
  79. Big Generalized Fibonacci numbers
  80. Binary Range Extraction
  81. Binary search tree validation
  82. Binary Search Trees
  83. Binary Simulation
  84. Binary Tree Compare
  85. Binding of Algebraic Data Types
  86. Bingo Card
  87. Bishop Movement checker
  88. Blaine is a pain
  89. Blobservation
  90. Blocks in an Irregular Pyramid
  91. Bloxorz Solver
  92. Boolean array generator
  93. Bowling score calculator
  94. Bracket Buster
  95. Brainfuck Translator
  96. Bribe the Guards of the Crown Jewels
  97. Bridge Puzzle
  98. Bridge: SAYC Openings
  99. Build a Trie
  100. Building blocks
  101. Building Chains Using the Arithmetic Derivative of a Number
  102. Button sequences
  103. Cable Matching Problem
  104. Caeser Encryption
  105. Calculate daily accurate interest for a bank account
  106. Calculate the expression
  107. Calculating Expected Utility
  108. Calculation of the Angles of a Triangle
  109. Call Center Call Backs
  110. Can these three numbers form a date?
  111. can you guess what it is ?
  112. Can you sum?
  113. Candy thieves
  114. Car Rental Business Needs Statistics and Programming
  115. Card-Chameleon, a Cipher with Playing Cards
  116. Carpet shop
  117. Cartesian neighbors distance
  118. Cartesian product
  119. Castle of Cubes
  120. Cat and Mouse - 2D Version
  121. Challenge Fun #17: Merge Arrays
  122. Challenge Fun #19: Black Hole
  123. Chameleon unity
  124. Cheat at rock paper scissors!
  125. Cheating a bit...
  126. Check and Mate?
  127. Checkerboard King Combo Move
  128. Checkout Line Pricing
  129. Chess Fun #10: Chess Encryption
  130. Chess Fun #9: Bishops And Rooks
  131. Chess position parser (FEN)
  132. Children and candies
  133. Chinese Zodiac
  134. Chocolate problem
  135. Choose featured projects for Gratipay's homepage!
  136. Circle area inside square
  137. Circular Limited Sums
  138. Clock Hands
  139. Clock Lock - Save the World, Time Traveler! :)
  140. Clone Graph
  141. Cockroach Bug Scatter
  142. Codenames - matrix conversions
  143. Codewars API
  144. Codwars or Codewars?
  145. Cody Block's Pro Skater
  146. Columnar Transposition Cipher Collisions
  147. Composed Integers Having Prime Factors Only Once
  148. Compound Nouns, Common Nouns, and Adjectives Test
  149. Computational Geometry #1: Mixing Paints
  150. Compute a convex hull
  151. Compute Nullable Non-Terminals
  152. Confidence Intervals
  153. Connect Four - placing tokens
  154. Consecutive Digit Constraints
  155. Construct Graph Class (simple)
  156. Context manager decorator
  157. Continuation in arguments, part 1
  158. Convergents of e
  159. Conversion between Kilobyte and KibiByte
  160. Convert between radians and degrees
  161. Convert integer to Whitespace format
  162. Convert Numbers to a 32-bitmap Hex ASCII Representation
  163. Convex hull area
  164. Conways game of life on a toroidal array
  165. Coordinates Validator
  166. Coping with NP-Hardness #1: 2-SAT
  167. Coping with NP-Hardness #2: Max Weight Independent Set of a Tree
  168. Coping with NP-Hardness #3: Finding the Minimum Hamiltonian Cycle
  169. Coping with NP-Hardness #4: 3-Recoloring
  170. Correct the date-string
  171. Count Connectivity Components
  172. Count the days!
  173. Count The Hits Adding Contiguous Powers!
  174. Countdown
  175. Counting Cuts
  176. Counting hexagons
  177. Courier 🚚
  178. Cracking the Vigenère cipher, step 1: determining key length
  179. Cramer, thanks for your contribution!
  180. Crane Operation
  181. Crazed Templating
  182. Create a one-liner FTP client with the ftplib
  183. Create palindrome
  184. Cricket Scores
  185. Crouching Distribution, Hidden Constant
  186. Custom Array Filters
  187. Custom Christmas Tree III: the center of leaves
  188. Cut me in Pieces but in The Way I Like
  189. Cut the cake
  190. Cycle Detection: Floyd's The Tortoise and the The Hare
  191. Cycle Detection: greedy algorithm
  192. D&D Character generator #1: attribute modifiers and spells
  193. D&D Character generator #2: psion power points
  194. D&D Character generator #3: carrying capacity
  195. Data mining #1
  196. Date Format Validation
  197. Deadlock Detection
  198. Debug the functions EASY
  199. Debugger
  200. Decimal to any Rational or Irrational Base Converter
  201. Decipher the sentence
  202. Decode the Morse code, advanced
  203. Decode the Morse code, for real
  204. Decompose a number
  205. Decreasing Numbers with N Digits
  206. Deficiently Abundant Perfect Amicable Numbers
  207. Democracy Representation
  208. denumerate string
  209. Department scheduler [simple]
  210. Derpcode Interpreter
  211. Design a Simple Automaton (Finite State Machine)
  212. Detecting Factions in Friend-Foe Networks
  213. Determine Results of Pole Vault Competition
  214. Devil's Sequence
  215. DevOps legacy roasting -> disco inferno -> burn baby burn
  216. Dice rolls threshold
  217. Diff That Poly!
  218. Diophantine Equation Solver
  219. Disease Spread
  220. Distance between two points
  221. Distinct contiguous elements in every window of size k
  222. Divide polynomial by polynomial
  223. Divisible by primes
  224. Divisor harmony
  225. Dobble
  226. Dobble: Identify the missing cards
  227. Dog recommendation system
  228. Dollar words
  229. Domino Tiling - 2 x N Board
  230. Domino Tiling - 3 x N Board
  231. Dota 2 Bots - Pudge's Meat Hook
  232. Double Even Magic Square
  233. Doubly Linked List
  234. Draw a Circle.
  235. Drinking Game
  236. Dropzone
  237. Dynamic Connectivity
  238. Easy Cyclist's Training
  239. Egg Drops
  240. Eight ways to iterate over table
  241. Elections: Weighted Average
  242. Elo rating - one game, one pair
  243. Email Address Obfuscator
  244. Endianness Conversion
  245. Endless String
  246. Enigeliisohe too Eniigeeliiisoohee Toroanisoliatooro
  247. Enumerable Magic #30 - Split that Array!
  248. Equivalent Dice
  249. Error Correction Codes
  250. Escape the Aliens
  251. Escape the maze
  252. Esolang Interpreters #1 - Introduction to Esolangs and My First Interpreter (MiniStringFuck)
  253. Esolang Interpreters #3 - Custom Paintf**k Interpreter
  254. Esolang: InfiniTick
  255. Esolang: Stick
  256. Esolang: Ticker
  257. Esoteric Language: 'Poohbear' Interpreter
  258. Euclidean distance in n dimensions
  259. Euler method for numerical integration
  260. Euler Squares
  261. Evil Autocorrect Prank
  262. Exact p
  263. Excel's COUNTIF, SUMIF and AVERAGEIF functions
  264. Exception Handling (with restrictions)
  265. Exclusive presentations
  266. Exercise in Summing
  267. Experimenting with a sequence of complex numbers
  268. Express number as sum of four squares
  269. Extended weekends
  270. Fabergé Easter Eggs crush test
  271. Family Relations
  272. Family Tree - Ancestors
  273. Fastest Code : Equal to 24
  274. Fat Fingers
  275. Features of a Given Array
  276. Feed Kahumolings!
  277. Fibo akin
  278. Fibonacci With a Broken Interpreter
  279. File Path Operations
  280. Fill in the gaps in my timesheet.
  281. Filtering Values For an Election
  282. Financing a purchase
  283. Find all possible number combos that sum to a number
  284. Find All The Unique Substrings
  285. Find amplitude of a binary tree
  286. Find Ends of Each Paths
  287. Find the Biggest Triangle
  288. Find the centre of a sphere
  289. Find the Counterfeit
  290. Find the files then read them
  291. Find the force of gravity between two objects
  292. Find the in-between point
  293. Find the lines!
  294. Find the Longest Increasing or Decreasing Combination in an Array
  295. Find the missed number
  296. Find the most adjacent integers of the same value in a grid
  297. Find the name of the lucky variable
  298. Find the Next Powers Higher than a Given Value With Given Constraints
  299. Find the random seed
  300. Find the sum of the roots of a quadratic equation
  301. Finding a Circulation
  302. Finish Guess the Number Game
  303. Finish NxN Array Tic-Tac-Toe Game
  304. First n Prime Numbers
  305. First-Class Function Factory
  306. Fix arithmetic progression
  307. Fix array sequence
  308. Fix the base conversion function!
  309. Fix the Bugs (Syntax) - My First Kata
  310. Fix the pipes
  311. Fix the robot and save the secret Mars base
  312. Fixed length palindromes
  313. Fixed-length integer partitions
  314. Fizz Buzz (with restrictions)
  315. Fizz Buzz Reloaded
  316. FizzBuzz++
  317. Flatten A Nested Dictionary That Contains Lists
  318. Float or Integer verifier
  319. Floating-point Approximation (III)
  320. Folding Tiles Solver
  321. Following the Paths of Numbers Through Prime Factorization
  322. Football Season
  323. Four Letter Words ~ Mutations
  324. Fractions class
  325. Fractions of a currency' smallest value
  326. Frogificator
  327. Fuel usage reporting
  328. Function Composition
  329. Function iteration
  330. Funnel Out A String
  331. Gambling Game: Choosing Order
  332. Game of Go
  333. Game of Thrones : Wildlings are coming!
  334. Generate Numbers From Digits #2
  335. Generic number class
  336. Geohashing
  337. Geometric Mean II
  338. Get Euchre Score
  339. Get recursion limit
  340. Get the Excel column title!
  341. Getting along with Bernoulli's numbers
  342. getting started #let's piay
  343. Getting the neighbors
  344. Give me data
  345. Gnomes and Hats: A Horror Story
  346. Golden Section Search
  347. GPS coordinate conversions - DD to DMS
  348. Grader
  349. Grid index
  350. Group prime numbers
  351. Grouped by commas
  352. Guess the (prime) number, digit by digit
  353. Guess the float #1
  354. Guess the list pattern #2
  355. Guess the list pattern #3
  356. Guess the list pattern #4
  357. Guess Who?
  358. guessing game server
  359. Gymbro's Unique Gym - Weight Calculator
  360. Hack the NSA
  361. Hackermann
  362. Hanoi Tower Array
  363. Happy Numbers. Another performance edition.
  364. Heartbeat Status Montor
  365. Help Green Lantern with his web site
  366. Help Mr. E
  367. Help Suzuki pack his coal basket!
  368. Helpers For a 3DGame I: Biggest Triangle in a Sphere
  369. Heroes of Might & Magic II: Chain Lightning
  370. Hidden pixels
  371. Hide a message in a deck of playing cards
  372. High score table
  373. Hofstadter Q
  374. How far away is it ?
  375. How good are you really?
  376. How long each order will take
  377. How many dots are covered
  378. How many eggs?
  379. How many feelings?
  380. HTML Complementary Color
  381. HTML Element Generator
  382. Hungarian Cardinal Numerals
  383. Hungarian Vowel Harmony (harder)
  384. Hypercube Lists
  385. I Liked the SQL Better...
  386. I'm already Tracer
  387. Image host filename generator
  388. Image Processing: Gaussian Blurring
  389. Imaginary Base Conversion
  390. Imperfect Fibonacci Rabbits
  391. Implement Classes by using Functions
  392. Implementing SHA-1
  393. Inertial Array
  394. Infinite continued fractions
  395. Insane Circular Limited Sums
  396. Insane Increasing or Decreasing Numbers
  397. Insane Tri-Bicolor Tiling
  398. Integer factorization: CFRAC basics
  399. Integer to string deciphering
  400. Integer triangles
  401. Integer Triangles I: Maximum Number of Integer Triangles with the Smallest Perimeter
  402. Interlaced Spiral Cipher
  403. Intro to Statistics - Part 1: A Five figure summary
  404. Intro to Statistics - Part 2: Boxplots
  405. Intro to Statistics - Part 3: Correlation Coefficients
  406. IntroToArt
  407. intTunes
  408. IPv4 Parser
  409. IRR Calculation - evaluation of profitability
  410. Is it a group? (Group theory, Abstract algebra)
  411. Is there a sequence re-occuring in the list
  412. Is this a good batch of stout? (Student's t test)
  413. Is this event within this time?
  414. Isogram Cipher
  415. Iterative Rotation Cipher
  416. Jacob's Weight Loss Program
  417. Javascript filter - 1
  418. Jimmy's Journey
  419. Job Matching #2
  420. Jobs
  421. Johnny the Poker Player - What is my equity?
  422. Joyful Transpiler
  423. Jumble words
  424. Jungerstein's Math Training Room: 4. O Pascal tree, how green are your leaves?
  425. Jungerstein's Math Training Room: 5. Cat back
  426. Kata 2019: Bonus Game I
  427. Kata 2019: Bonus Game II
  428. Kata Impossible I - The Impossible Lottery
  429. KISS - Keep It Simple Stupid
  430. Knapsack problem - the max value with the lists of elements
  431. Krazy King Blackjack
  432. Largest Numeric Palindrome
  433. Largest Power that Divides a Large Factorial
  434. Largest prime number containing n digit
  435. Last
  436. Last digits of N^2 == N
  437. Latin Squares
  438. Lattice Paths, But...?
  439. Lazily executing a function
  440. Lazy Init
  441. Leaderboard climbers
  442. Learning Remote Control
  443. Left$ and Right$
  444. Length Factorial Encryption
  445. Let's Play Darts: Beat The Power!
  446. Letterss of Natac
  447. Letterss of natac: build or buy
  448. Level Up!
  449. Lexographic sort with a twist
  450. Linked Lists - Front Back Split
  451. Linked Lists - Remove Duplicates
  452. Linked Lists - Shuffle Merge
  453. Linked Lists - Sorted Merge
  454. Linux history and ! command. Series#3 The !-n command
  455. Linux history and ! command. Series#4 The !string command
  456. Linux history and ! command. Series#5 The !?string command
  457. List of pairs instead of dictionary
  458. Little PL/SQL parser - get text literals
  459. Logic Detective
  460. Longest Consecutive Sequence of Squares
  461. Longest Palindromic Substring (Linear)
  462. Longest Strict Bouncy Subarray
  463. Looper
  464. Loose Change (Part 2)
  465. Ludic numbers
  466. Magic Zeckendorf
  467. Magritte - Golconda
  468. Mahjong - #1 Pure Hand
  469. Make a spiral
  470. Making Copies
  471. Manage the Robot Factory: Day 1
  472. Markings to White Triangles and How to Find Them
  473. Master your primes: sieve with memoization
  474. Mastermind
  475. matrix expanding
  476. Matrix Exponentiation
  477. Max Collatz Sequence Length
  478. Max number of people and year in a specific place
  479. Maximum 2d subarray sum
  480. Maximum and Minimum Numbers as a Result of all Possible Concatenations and Fulfilling Certain Constraints
  481. Maximum Area in Histogram
  482. Maximum Overkill
  483. Maze Exit
  484. Mean without outliers
  485. Memoized Log Cutting
  486. Message from Alien (Easy Version)
  487. Midpoint Sum
  488. Minesweeper
  489. Minimal Cost Binary Search Trees
  490. Minimal Squarewave PCM Synthesizer
  491. Minimum exact p
  492. Minimum number of taxis
  493. Minimum path in squares
  494. Minimum Ticket Cost
  495. Minimum Transactions
  496. Minimum unfairness of a list/array
  497. Mistaking a forest for a tree
  498. Molecule to atoms
  499. Mongodb ObjectID
  500. MONTE CARLO 3D
  501. Morse Encoding
  502. Most common first
  503. Most improved - Puzzles #4
  504. MTV Cribs
  505. Multi Poly Coordinates
  506. Multicast IP Address to MAC address mapping
  507. Multiply Two Numbers Without Integers
  508. Multiply without asterisk
  509. Multiplying Binomials
  510. Multirange iterator
  511. Multisize Nonogram Solver
  512. Musical Scales and Modes
  513. My smallest code interpreter (aka Brainf**k)
  514. My Very Own Python's Split Function
  515. Mysterious Letters
  516. N Linear
  517. n times 2 to the power of x without function or class method and return
  518. n-Bonacci Ratio
  519. N-centered Array
  520. N-Dimensional Vector Magnitude
  521. N00bify - English to n00b Translator
  522. Nearly Flatten a Messy Array
  523. Nerdle - The General Version
  524. New season, new league
  525. Next Higher Value # 1
  526. Next level string padding
  527. NIM the game
  528. No adjacent integers sequence generator
  529. No arithmetic progressions
  530. No musical :(
  531. No unknown variables!
  532. Northwest and Southeast corners
  533. nova polynomial 5. from roots
  534. Now that's a crib!
  535. Number Decoding
  536. Number of Digit d in m-based Number Converted to Base n
  537. Numbers Having Digits Occurring Only Once
  538. Numbers with Collatz Starting Patterns
  539. Nut Farm
  540. Nut Farm 2
  541. OCR Numbers
  542. Odd-squares traversal
  543. Odder than the rest
  544. Odder than the rest - 2
  545. Old Mobile Display
  546. One for His Nob: Scoring Cribbage Hands
  547. One Line Task: Diamond Creator Pro
  548. One line task: Is the King in check ?
  549. One Line Task: Palindrome String
  550. Only-Readable-Once list
  551. Operation Transformation
  552. Operator Insertion
  553. Optimal Taxi Fare
  554. Optimized Pathfinding Algorithm
  555. Oracle: Coin Method
  556. Ordering Beers in Poland
  557. Ordinal Numbers
  558. Packet Delivery -- Enforcing Constraints
  559. packing rectangles
  560. Palindrome integer composition
  561. Palindromic Expression
  562. Palindromization
  563. Pandigital Sequence
  564. Paperboy 2
  565. Papers, Please
  566. Parametric to Rectangular Equation
  567. Parentheses are loud !
  568. Parse bank account number
  569. Parse python terminal output
  570. Parse the log
  571. Partial Word Searching
  572. Password generator
  573. Password validator
  574. Path Finder #4: where are you?
  575. Perimeter Sum
  576. Permutation-free Strings
  577. Personalized brand list
  578. Physics - Mechanics - Atwood Machines in Series
  579. Pi approximation fractions
  580. Picking the best casino game
  581. Pig Sursurunga
  582. Pitches and Notes
  583. Plotting points on a grid.
  584. Pointless Farmer
  585. Points in the circle
  586. Points On A Line
  587. Polydivisible Numbers
  588. Polynomial Evaluation - Binomial Form
  589. Posix command
  590. Possibilities of throwing a coin n times
  591. Possible Triangles Formed with Available Iron Rods
  592. Power Laws
  593. Power tower modulo m
  594. Precise fractions pt. 1 - basics
  595. Prefill an Array
  596. Prime Ant - Crazy Version
  597. Prime factorization
  598. Prime number decompositions
  599. Principal Diagonal | VS | Secondary Diagonal
  600. Printing Array elements with Comma delimiters
  601. PRNG: Linear Congruential Generator
  602. Probabilities for Sums in Rolling Cubic Dice
  603. Probable Prime or Composite (Much bigger primes)
  604. Process Waterfowl Survey Data Results
  605. Processes
  606. Product Partitions II
  607. Program hangs!
  608. Progress of a challenge
  609. Progressive Spiral Number Branch
  610. Progressive Spiral Number Distance
  611. Progressive Spiral Number Position
  612. Projectile Motion
  613. Promenade Fractions (from BIO 2016)
  614. Propositional SAT Problem
  615. Propositional SAT Problem [Performance]
  616. Pythagorean Triplets
  617. Python's Dynamic Classes #1
  618. Python's Dynamic Classes #2
  619. Python's Dynamic Classes #3
  620. Quadratic Enumerator
  621. Quest: Kill ten rats!
  622. Queue Battle
  623. Radical Simplifier
  624. Radix Tree
  625. Ragbaby cipher
  626. Random Integers
  627. Range Extractor
  628. Range of Integers in an Unsorted String
  629. Range Parser
  630. Ranking Poker Hands
  631. Rational Zeros
  632. RDS (Radio Data System) Splash Text Concatenation
  633. Read a UPC/Barcode
  634. Read a UPC/Barcode Part 2
  635. Read the time
  636. Readability is King
  637. Recaman Sequence
  638. Recover a secret string from random triplets
  639. Recovering from a Disk Crash - Reverse Engineering Some Lost Code!
  640. Rectangle Cipher Puzzle
  641. Rectangular Subsets of Tiles in Square Grids (Fixed)
  642. Recursion puzzle
  643. Regex for a decimal number divisible by 4
  644. Regex for Gregorian date validation
  645. Regex to Match Significant Figures
  646. Regexp basics - parsing mana cost
  647. RegExp Fun #1 - When I miss few days of gym
  648. Regular expression for binary numbers divisible by 5
  649. Regular Expressions (groups): Splitting phone numbers into their separate parts.
  650. Relatively Prime Numbers
  651. Remember members decorator
  652. Retirement Planning as a Service
  653. Reverse a singly-linked list
  654. Reverse Inside Parentheses (Inside Parentheses)
  655. Reverse polish notation calculator
  656. Reverse Polish Notation solver (Easy)
  657. Reversi row rudiments
  658. riemann sums II (trapezoidal rule)
  659. Right Truncatable Harshad numbers
  660. RoboScript #2 - Implement the RS1 Specification
  661. RoboScript #3 - Implement the RS2 Specification
  662. RoboScript #4 - RS3 Patterns to the Rescue
  663. Roman numerals, Zeroes and Fractions
  664. ROT13 variant cipher
  665. Rotate Array (JS)
  666. Rotate Corners
  667. Rotated string
  668. Rotational energy levels
  669. Rotational state populations (the Boltzmann distribution)
  670. Rotten Oranges
  671. Round by 0.5 steps
  672. RPG dice roller
  673. RPS Knockout Tournament Winner
  674. Rubiks cube CFOP algo : Cross
  675. Rudimentary Pivot Table
  676. Rule 30
  677. Russian Peasant Multiplication
  678. Sales report
  679. Same Birthday Probability
  680. Sat Nav directions
  681. Save for retirement
  682. Schedulability Test
  683. School Class Arrangement
  684. Scraping: Get the Year a CodeWarrior Joined
  685. Searching for Bulls
  686. Seat Allocation Double Dutch
  687. Secret Agent Time Travel Calculations
  688. Secret knock
  689. Selective memory
  690. Self-closing Cookie Jar
  691. Semi-Thue Systems - The Word Problem [Part 1]
  692. Sentence to words
  693. Separate filename from extension
  694. Sequence generator
  695. Set Closure Generator
  696. Seventh JSON of a seventh JSON
  697. Shakespearean Tug of War
  698. Shallowest path across the river
  699. Shelve your trophies
  700. Shifted cycles
  701. Shorten IPv6 Address
  702. Shortest string
  703. Shortest string that contains all possible bigrams from set of characters
  704. Sierpinski triangle
  705. Simple Barcode Scanner
  706. Simple elevator
  707. Simple Encryption #2 - Index-Difference
  708. Simple Encryption #4 - Qwerty
  709. Simple Events
  710. Simple eviternity numbers
  711. Simple Finite State Machine Compiler
  712. Simple Fun #134: Fix Progression
  713. Simple Fun #139: Black And White
  714. Simple Fun #148: Exchange Sort
  715. Simple Fun #149: Next Day Of Week
  716. Simple Fun #150: Robot Transfer
  717. Simple Fun #153: Knight Rescue
  718. Simple Fun #167: Spreadsheet
  719. Simple Fun #170: Sum Groups
  720. Simple Fun #178: Faulty Odometer
  721. Simple Fun #188: Slogans
  722. Simple Fun #190: Folding Paper
  723. Simple Fun #201: Cards And Pero
  724. Simple Fun #26: Weak Numbers
  725. Simple Fun #283: Censor The Forbidden Words
  726. Simple Fun #299: Look And Say And Sum
  727. Simple Fun #335: Two Programmers And Gold
  728. Simple Fun #342: Buy Newspaper
  729. Simple Fun #387: Lonely Frog IV
  730. Simple Fun #55: Cyclic String
  731. Simple Fun #62: Draw Rectangle
  732. Simple Fun #89: Boxes Packing
  733. Simple Interactive Interpreter
  734. Simple max digit sum
  735. Simple maze
  736. Simple non-decreasing array
  737. Simple number divisibility
  738. Simple number triangle
  739. Simple palindrome game
  740. Simple parenthesis removal
  741. Simple Pig Latin
  742. Simple repeated words
  743. Simple Socket Client
  744. Simple string matching
  745. Simple Substitution Cipher Helper
  746. Simple Sum (with restrictions)
  747. Simple Web Framework #1: Create a basic router
  748. Simpler Interactive Interpreter
  749. Simplexer
  750. Simplifying multilinear polynomials
  751. Simulating Collective Behaviour with Linear Threshold Model
  752. Simultaneous Equations - Three Variables
  753. Single Word Pig Latin
  754. Sir , showMe yourID
  755. Slamming Lockers
  756. Sleigh Authentication
  757. So Easy: Charge time calculation
  758. So many kinds of numbers!
  759. Social Golfer Problem Validator
  760. Social Golfer Problem Validator V2
  761. Socialist distribution
  762. socket guessing game client
  763. Solve the Grid! Binary Toggling Puzzle
  764. Some Circles
  765. Some Tips For Quality Control I
  766. Sophie Germain primes
  767. Sort a massive list of strings (hard)
  768. Sort only integers in Nested List
  769. Sort the comments!
  770. Sortable Poker Hands
  771. Sortable Shapes
  772. Sorting Integers into a nested list
  773. Sorting Poker
  774. Sorting Time
  775. Space Invaders Underdog
  776. Spanish class help
  777. Speed Control
  778. Spelling Bee II
  779. SPF Russia
  780. Spidey Swings Across Town
  781. Spinning Rings - Fidget Spinner Edition
  782. Split string by multiple delimiters
  783. Split Without Loss
  784. Splitting the Workload (part II)
  785. Sports league table - help your local team!
  786. Spot the Differences
  787. Spreadsheet Cell Name Conversions
  788. Spy Agent
  789. Spy games - rebuild your decoder
  790. Squad number generator
  791. Square sums (simple)
  792. Stack Arithmetic Machine
  793. Stacked Balls - 3D (square base)
  794. Stop the loop after n seconds
  795. Strange roman numbers
  796. Streaky Patterns in Coin Flips
  797. String character frequency
  798. String counting
  799. String Pyramid
  800. String searching with wildcard
  801. String Shortener (shrink)
  802. String subpattern recognition II
  803. String subpattern recognition III
  804. String to integer conversion
  805. Strip Url Params
  806. Sub-array division
  807. Subsequence Product Sum
  808. Subset Sum Problem
  809. Sudoku Solver
  810. Sum and Multiply
  811. Sum of certain products
  812. Sum of certain products II
  813. Sum of dices
  814. Summing subsets in list
  815. Sums of Perfect Squares
  816. Sungka
  817. Supernatural
  818. Swap items in a dictionary
  819. Swap Row In Certain Columns of a Matrix
  820. Symbolic differentiation of prefix expressions
  821. T.T.T.#2: Equal to 24
  822. Task master
  823. Temperature converter
  824. Terrible Exception Handling
  825. Tetris Series #2 — Primitive Gameplay
  826. Texas Hold'em Hands
  827. The Chakitra's language
  828. The cross-stitch Kata
  829. The Enigma Machine - Part 2: A Rotor
  830. The Enigma Machine - Part 3: The Reflector
  831. The Enigma Machine - Part 4: A Rotor Part II
  832. The most asked question on CodeWars
  833. The Seven Bridges of Königsberg
  834. Tic-Tac-Toe Checker
  835. Time For Validation
  836. Traffic lights
  837. Train of dominoes
  838. Triangulate a konvex polygon
  839. Tug-o'-War
  840. Twice Their Age
  841. Two Sets of Equal Sum
  842. Understanding epidemic.
  843. Unicode Math
  844. Vanilla Neural Network from scratch
  845. Vanity Plates
  846. Watchmaker problems - watch hands issue
  847. Where am I again?
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