sololearn-challenges
sololearn-challenges copied to clipboard
rabestro
Descriptions of SoloLearn Coding Challenges (all 72, including pro) and solutions in C, Java, Python and Ruby
Sololearn Coding Challenges
There are all 72 problems from SoloLearn Code Coach with full descriptions and my solutions in Java. The problems grouped by dificulty: Easy, Medium, Hard. The codes have written on mobile device in Sololearn sandbox, sucessfully run and passes all tests by Sololearn. The link to my profile at Sololearn: https://www.sololearn.com/Profile/15186890/
As an answer to the #OneLiners challenge from SoloLearn I also created One-Line solutions in Ruby and One-Statement solutions in Java language for about 60% problems.
Easy
| Description | Java | Used Java API classes and methods, notes |
|---|---|---|
| Popsicles | Popsicles.java | Ternary operator |
| Halloween Candy | HalloweenCandy.java | Math |
| Fruit Bowl | FruitBowl.java | |
| Ballpark Orders | BallparkOrders.java | Map, BigDecimal, Stream, Scaner::tokens (Java 11) |
| Cheer Creator | CheerCreator.java | String::repeat (Java 11) |
| Skee-ball | SkeeBall.java | |
| Paint Costs | PaintCosts.java | BigDecimal, RoundingMode |
| Argentina | Argentina.java | I use multiplication to keep max precision |
| Balconies | Balconies.java | Scanner::useDelimiter |
| Candles | Candles.java | |
| Duct Tape | DuctTape.java | Math |
| Easter Eggs | EasterEggs.java | Ternary operator |
| Guard Flamingos | GuardFlamingos.java | |
| Gotham City | GothamCity.java | MessageFormat::format |
| Hovercraft | Hovercraft | BigDecimal |
| Izzy the Iguana | IzzyIguana.java | Map, Scaner::tokens (Java 11) |
| Kaleidoscopes | Kaleidoscopes.java | BigDecimal (There is errors in SoloLearn tests) |
| Jungle Camping | JungleCamping.java | Map, Scaner::tokens (Java 11) |
| Land Ho! | LandHo.java | |
| Neverland | Neverland.java | System.out::printf |
| Extra-Terrestrials | ExtraTerrestrials.java | StringBuilder::reverse |
| Zip Code Validator | ZipCodeValidator.java | Pattern::matches |
| Vowel Counter | VowelCounterRE.java | String::replaceAll |
| Isogram Detector | IsogramDetector.java | Pattern::matches |
| Multiples | Multiples.java | IntStream, lambda |
| Number of Ones | NumberOfOnes.java | Integer::bitCount |
Medium
| Description | Java | Used Java API classes and methods, notes |
|---|---|---|
| Pig Latin | PigLatinRE.java | String::replaceAll, RegEx |
| _ | PigLatinStream.java | Scanner::tokens, lambda |
| _ | PigLatinClassic.java | System.out::printf |
| Safety Deposit Boxes | SafetyDepositBoxes.java | String::replaceAll, RegEx (tricky?) |
| Roadrunner | Roadrunner.java | |
| Snap, Crackle and Pop | SnapCrackleAndPop.java | Stream, lambda |
| Deja Vu | DejaVu.java | Pattern::matches |
| The Spy Life | TheSpyLife.java | StringBuilder |
| Hex Color Code Generator | HexColorCodeGenerator.java | System.out::printf |
| Symbols | Symbols.java | String::replaceAll, RegEx |
| Super Sale | SuperSale.java | Stream |
| Duty Free | DutyFree.java | Stream |
| Carrot Cake | CarrotCake.java | System.out::printf |
| Building Blocks | BuildingBlocks.java | IntStream::generate |
| Name Buddy | NameBuddy.java | String::concat |
| _ | NameBuddyRegEx.java | String::matches |
| That's odd... | ThatsOdd.java | IntStream |
| No Numerals | NoNumerals.java | Map, Stream, lambda |
| Secret Message | SecretMessage.java | Stream, lambda |
| Divisible | Divisible.java | Stream, lambda |
| Even Numbers | EvenNumbers.java | IntStream |
| Military Time | MilitaryTime.java | Date & Time API Java 11 |
| Tax Free | TaxFree.java | Stream |
| How Far? | HowFar.java | String::replaceAll, RegEx |
| Average Word Length | AverageWordLength.java | String::split, String::replaceAll |
| . | AverageWordLengthStream.java | Stream, Collectors::averagingInt |
| YouTube Link Finder | YouTubeLinkFinder.java | String::replaceAll, RegEx |
| Convert US date to EU date | ConvertDate.java | Date & Time API Java 11 |
| Day of the Week | DayOfWeek.java | Date & Time API Java 11 |
| Camel to Snake | CamelToSnake.java | String::replaceAll, RegEx |
| Days between dates | DaysBetweenDates.java | Date & Time API Java 11 |
| Text Decompressor | TextDecompressor.java | Stream |
| Snowballing Numbers | SnowballingNumbers.java | Stream |
| Flowing Words | FlowingWords.java | RegEx |
| Splitting Strings | SplittingStrings.java | String::format, String::split, String::join, RegEx |
| Missing Numbers | MissingNumbers.java | Stream |
| Initials | Initials.java | Stream, RegEx |
| Credit Card Validator | CreditCardValidator.java | StringBuilder, Stream |
| CMYK to RGB | CmykToRgb.java | Math, float |
Hard
| Description | Java | Used Java API classes and methods, notes |
|---|---|---|
| New Driver's License | NewDriversLicense.java | Stream, lambda |
| It's a Sign | ItsSign.java | StringBuilder, Stream |
| Mathematics | Mathematics.java | Interface, Lambda, RegEx, Collections, Recursion |
| Password Validation | PasswordValidation.java | RegEx |
| Security | Security.java | RegEx |
| 2D Map | Map2D.java | Math, String::indexOf |
| Hofstadter's Q-Sequence | HofstadtersQSequence.java | |
| Digits of Pi | PiCalculation.java | BigDecimal, Algorithm |
| Longest Common Substring | Longest Common Substring | |
| Poker Hand | PokerHand.java | Stream, RegEx |
| Word Rank | Word Rank |
rabestro