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coding-challenges

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This project contains solutions to various programming exercises, problems, algorithms, puzzles etc.

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coding-challenges
-------------------
This project contains solutions to various coding exercises, problems, algorithms, puzzles etc.

### [Elements of Programming Interviews in Go](https://github.com/igor-baiborodine/epi-go)

### Exercism
* [Go Exercises](/exercism/go-exercises.md) on the Go Playground

### CodeWars
* Python Katas on [repl.it](https://repl.it/@igor_baiborodin)
* [Go Katas](/codewars/go-katas.md) on the Go Playground

### HackerRank
* Problem Solving
  * Data Structures > Left Rotation: [task](/hackerrank/problem-solving/data-structures-left-rotation.pdf), [solution](/hackerrank/problem-solving/data-structures-left-rotation.py)
  * Data Structures > Reverse a Linked List: [task](/hackerrank/problem-solving/data-structures-reverse-linked-list.pdf), [solution](/hackerrank/problem-solving/data-structures-reverse-linked-list.py)
    
* Java
  * Strings > Tag Content Extractor: [task](/hackerrank/java/strings_tag-content-extractor-task.pdf), [solution](/hackerrank/java/StringsTagContentExtractorSolution.java)
  * BigNumber > Java BigDecimal: [task](/hackerrank/java/bignumber_java-bigdecimal-task.pdf), [solution](/hackerrank/java/BigNumberJavaBigDecimalSolution.java)
  * Data Structures > Java Subarray: [task](/hackerrank/java/data-structures_java-subarray-task.pdf), [solution](/hackerrank/java/DataStructuresJavaSubarray.java)
  * Data Structures > Java 1D Array (Part 2): [task](/hackerrank/java/data-structures_java-1d-array-part2_task.pdf), [iterative solution](/hackerrank/java/DataStructuresJava1DArrayPart2Iterative.java), [recursive solution](/hackerrank/java/DataStructuresJava1DArrayPart2Recursive.java)
  * Data Structures > Java Stack: [task](/hackerrank/java/data-structures_java-stack_task.pdf), [solution](/hackerrank/java/DataStructuresJavaStack.java)
  * Data Structures > Java Dequeue: [task](/hackerrank/java/data-structures_java-dequeue_task.pdf), [solution](/hackerrank/java/DataStructuresJavaDequeue.java)
  * Data Structures > Java BitSet: [task](/hackerrank/java/data-structures_java-bitset_task.pdf), [solution](/hackerrank/java/DataStructuresJavaBitSet.java)
* Python
  * Itertools > Compress the String!: [task](/hackerrank/python/itertools_compress-the-string-task.pdf), [solution](/hackerrank/python/itertools_compress-the-string-solution.py)
  * Itertools > Iterables and Iterators: [task](/hackerrank/python/itertools_iterables-and-iterators-task.pdf), [solution](/hackerrank/python/itertools_iterables-and-iterators-solution.py) 
  * Itertools > Maximize It!: [task](/hackerrank/python/itertools_maximize-it-task.pdf), [solution](/hackerrank/python/itertools_maximize-it-solution.py) 
  * Collections > Word Order: [task](/hackerrank/python/collections_word-order-task.pdf), [solution](/hackerrank/python/collections_word-order-solution.py) 
  * Collections > Piling Up!: [task](/hackerrank/python/collections_piling-up-task.pdf), [solution](/hackerrank/python/collections_piling-up-solution.py) 
  * Collections > Company Logo: [task](/hackerrank/python/collections_company-logo-task.pdf), [solution](/hackerrank/python/collections_company-logo-solution.py) 
  * Date and Time > Time Delta: [task](/hackerrank/python/date-and-time_time-delta-task.pdf), [solution](/hackerrank/python/date-and-time_time-delta-solution.py) 
  * Built-Ins > Athlete Sort: [task](/hackerrank/python/built-ins_athlete-sort-task.pdf), [solution](/hackerrank/python/built-ins_athlete-sort-solution.py) 
  * Built-Ins > Any or All: [task](/hackerrank/python/built-ins_any-or-all-task.pdf), [solution](/hackerrank/python/built-ins_any-or-all-solution.py) 
  * Built-Ins > ginortS: [task](/hackerrank/python/built-ins_ginorts-task.pdf), [solution](/hackerrank/python/built-ins_ginorts-solution.py) 
  * Python Functionals > Map and Lambda Function: [task](/hackerrank/python/python-functionals_map-and-lambda-function-task.pdf), [solution](/hackerrank/python/python-functionals_map-and-lambda-function-solution.py) 
  * Python Functionals > Validating Email Addresses With a Filter: [task](/hackerrank/python/python-functionals_validating-email-addresses-with-filter-task.pdf), [solution](/hackerrank/python/python-functionals_validating-email-addresses-with-filter-solution.py) 
      
### Codility
* Lesson 1 - Iterations
  * BinaryGap: [task](/codility/lesson1/BINARY_GAP_README.md), [Java solution](/codility/lesson1/BinaryGap.java), [Python solution](/codility/lesson1/BinaryGap.py)
* Lesson 2 - Arrays
  * OddOccurrences In Array: [task](/codility/lesson2/ODD_OCCURRENCES_IN_ARRAY_README.md), [Java solution](/codility/lesson2/OddOccurrencesInArray.java), [Python solution](/codility/lesson2/OddOccurrencesInArray.py)
  * CyclicRotation: [task](/codility/lesson2/CYCLIC_ROTATION_README.md), [Java solution](/codility/lesson2/CyclicRotation.java),
  [Python solution](/codility/lesson2/CyclicRotation.py)   
* Lesson 3 - Time Complexity
  * TapeEquilibrium: [task](/codility/lesson3/TAPE_EQUILIBRIUM_README.md), [Java solution](/codility/lesson3/TapeEquilibrium.java), [Python solution](/codility/lesson3/TapeEquilibrium.py)
  * FrogJmp: [task](/codility/lesson3/FROG_JMP_README.md), [Java solution](/codility/lesson3/FrogJmp.java), [Python solution](/codility/lesson3/FrogJump.py)
  * PermMissingElem: [task](/codility/lesson3/PERM_MISSING_ELEM.md), [Python solution](/codility/lesson3/PermMissingElem.py)    
* Lesson 4 - Counting Elements
  * FrogRiverOne: [task](/codility/lesson4/FROG_RIVER_ONE_README.md), [Python solution](/codility/lesson4/FrogRiverOne.py)
  * MissingInteger: [task](/codility/lesson4/MISSING_INTEGER_README.md), [Python solution](/codility/lesson4/MissingInteger.py)
  * PermCheck: [task](/codility/lesson4/PERM_CHECK_README.md), [Python solution](/codility/lesson4/PermCheck.py)
  * MaxCounters: [task](/codility/lesson4/MAX_COUNTERS_README.md), [Python solution](/codility/lesson4/MaxCounters.py)
* Lesson 5 - Prefix Sums
  * CountDiv: [task](/codility/lesson5/COUNT_DIV_README.md), [Python solution](/codility/lesson5/CountDiv.py)
  * PassingCars: [task](/codility/lesson5/PASSING_CARS_README.md), [Python solution](/codility/lesson5/PassingCars.py)
  * GenomicRangeQuery: [task](/codility/lesson5/GENOMIC_RANGE_QUERY_README.md), [Python solution](/codility/lesson5/GenomicRangeQuery.py), [Python solution 2](/codility/lesson5/GenomicRangeQuery2.py)

#### Misc
* Java
  * Strings > Common Consecutive Letters: [solution](/misc/java/CommonConsecutiveLetters.java)
  * Strings > Well Formatted String: [solution](misc/java/WellFormattedString.java)

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