List of Python Kata to Update - codewars/content-issues GitHub Wiki

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