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README

CtCI-6th-Edition

Solutions for Cracking the Coding Interview 6th Edition by Gayle Laakmann McDowell.

Crowdsourcing solutions for every widely used programming language. Contributions welcome.

Cloning

Solutions in Java are contained directly in this repo and are the same solutions found in the book. Solutions in other programming languages are contributed by the community and each have their own dedicated repos which are referenced from this repo as git submodules. What this means for cloning:

  • If you want to make a local clone of solutions in all languages, you should use the --recursive option:

    git clone --recursive https://github.com/careercup/CtCI-6th-Edition.git
    
  • If you're only interested in the Java solutions:

    git clone https://github.com/careercup/CtCI-6th-Edition.git
    
  • If you originally cloned without --recursive, and then later decide you want the git submodules too, run:

    git submodule update --init --recursive
    

Contributing

Work Flow

  1. Fork the appropriate repo for your language to your GitHub user. (see Where to submit pull requests)
  2. Write quality code and lint if applicable.
  3. Add tests if applicable.
  4. Open a pull request and provide a descriptive comment for what you did.

Where to submit pull requests

Pull requests pertaining to Java solutions should be submitted to the main CtCI-6th-Edition repo. Please submit pull requests for all other languages to the appropriate language-specific repo.

Adding a new Language

Solutions in other languages are welcome too and should follow this workflow:

  1. Create the new repo under your own GitHub user account and start contributing solutions. The repo name should follow this naming convention: CtCI-6th-Edition-<language>.
  2. Open an issue on the CtCI-6th-Edition repo to request that your solution repo be promoted to join the careercup GitHub organization and referenced from the main repo as a git submodule.
  3. If your request is approved, navigate to your repo's settings page and select the "Transfer Ownership" option, and specify "careercup" as the new owner.

Core symbols most depended-on inside this repo

add
called by 136
Java/Ch 17. Hard/Q17_01_Add_Without_Plus/QuestionA.java
put
called by 99
Java/Ch 07. Object-Oriented Design/Q7_12_Hash_Table/Hasher.java
length
called by 80
Java/Ch 02. Linked Lists/Q2_05_Sum_Lists/QuestionB.java
add
called by 78
Java/Ch 03. Stacks and Queues/Introduction/MyQueue.java
get
called by 77
Java/Ch 10. Sorting and Searching/Q10_08_Find_Duplicates/BitSet.java
get
called by 60
Java/Ch 07. Object-Oriented Design/Q7_12_Hash_Table/Hasher.java
size
called by 60
Java/Ch 17. Hard/Q17_07_Baby_Names/NameSet.java
arrayToString
called by 59
Java/CtCILibrary/CtCILibrary/AssortedMethods.java

Shape

Method 2,047
Class 590
Enum 19

Languages

Java100%

Modules by API surface

Java/CtCILibrary/CtCILibrary/AssortedMethods.java26 symbols
Java/Ch 03. Stacks and Queues/Q3_01_Three_in_One/MultiStack.java22 symbols
Java/Ch 07. Object-Oriented Design/Q7_10_Minesweeper/Cell.java16 symbols
Java/Ch 07. Object-Oriented Design/Q7_07_Chat_Server/User.java15 symbols
Java/Ch 16. Moderate/Q16_12_XML_Encoding/QuestionString.java12 symbols
Java/Ch 08. Recursion and Dynamic Programming/Q8_14_Boolean_Evaluation/Others.java12 symbols
Java/Ch 07. Object-Oriented Design/Q7_10_Minesweeper/Board.java12 symbols
Java/Ch 07. Object-Oriented Design/Q7_09_Circular_Array/CircularArray.java12 symbols
Java/CtCILibrary/CtCILibrary/TreeNode.java11 symbols
Java/Ch 17. Hard/Q17_14_Smallest_K/Tester.java11 symbols
Java/Ch 16. Moderate/Q16_25_LRU_Cache/Cache.java11 symbols
Java/Ch 07. Object-Oriented Design/Q7_12_Hash_Table/Hasher.java11 symbols

For agents

$ claude mcp add CtCI-6th-Edition \
  -- python -m otcore.mcp_server <graph>

⬇ download graph artifact