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