Update README (#108) (#111)

README.md

@@ -2,31 +2,89 @@
 Data structure and Algorithm (DSA)
 
 ## Contribution Guidelines
-### 1. Folders or files naming
-The folder or file should have the below conditions:
-- The name should be in lower case.
-- The word should be separate with a **dash(-)**.
-- When have new topic should create a new folder and index for it.
-- A new file should add to the **index(README.md)** using [relative links](https://compugoddess.com/relative-vs-absolute-links/)
-- It can only contain **dash(-)** it cannot have other specific characters.
 
-For example:
+### **1. Contribution Specifications**
+
+The problem being contributed must either be a simple **file** (**Eg.** [`kruskal-algorithm.cpp`](https://github.com/MakeContributions/DSA/blob/main/graphs/c-or-cpp/kruskal-algorithm.cpp), [`linear-search.java`](https://github.com/MakeContributions/DSA/blob/main/searching/java/linear-search.java)) or a more complex **directory** ([`palindrome/`](https://github.com/MakeContributions/DSA/tree/main/strings/rust/palindrome)). This is a unit `problem`.
+
+The directory tree has the following convention of `category/language/problem`, where `category` is the topic or category of the  problem being contributed (**Eg.** `strings`, `sorting`, `linked-lists` etc.), `language` represents the language code of the problem (**Eg.** `c-or-cpp` for C/C++, `python` for Python, `java` for Java etc.), and `problem` is a conforming name to the problem (**Eg.** `linear-search.cpp`, `palindrome`, `queue-linked-list.cpp` etc.)
+
+A unit `problem` must conform to the following specifications:
+- The name should be in lowercase. (**Eg.** `palindrome/`, `binary-search.cpp` etc.).
+- Each word must be seperated by a **dash** or a **hyphen** (`-`).
+
+**If you have a problem that belongs to a new *topic* or *category* than one which are present:**
+1. Create a new folder and an index for it inside (a readme, `README.md` file).
+2. To each new index file, write the readme with your `problem` in it ([Markdown Documentation](https://guides.github.com/features/mastering-markdown/)).
+3. The folder name can also only contain **lowercase characters** and **dashes** or **hyphens** (`-`) (Eg. `strings` `sorting` etc.)
+
+### Simple (File) Contributions
+
+The file should conform to the `problem` specification, and the extension (**Eg.** `linear-search.java`, `kruskal-algorithm.cpp`, `count-inversions.js` etc.)
+
+### Project/Folder-based Contributions
+
+The project and folder-based contributions have a bit more stricter contribution contribution specifications.
+
+The folder should conform to the `problem` specification, along with the following specifications
+
+**Folder Structure**
+```bash
+problem-name\
+| - .gitignore
+| - README.md
+| - Makefile       # or the specific specification/requirements/configuration file
+| - src\
+    | - main.ext
 ```
-DSA
-  | searching
-    | readme.md -> should create an readme for the index
-    | c-or-cpp
-      | linear-search.cpp
-      | binary-search.cpp
-    | python
-      | linear-search.py
-      | binary-search.py
-    | csharp
-      | linear-search.cs
-      | binary-search.cs
+
+#### - `README.md` Specification / Template
+
+```markdown
+# <Title of the Problem>
+
+< description of the problem >
+
+## Prerequisites
+
+- prerequisite library or package
+- [prerequisite library](https://www.example.com/link-to-official-library)
+
+## Instructions
+
+- instructions to run the project
+- < Simple and reproducible commands to execute the project >
+    ```bash
+     make # or 'cargo run', or 'dotnet run' or 'mvn exec:java' etc.
+    ```
+## Test Cases & Output < if exists>
+
+< If you can provide test cases, describe it here, else remove this section >
 ```
-### 2. Naming Convention
-The programming should keep the naming convention rule of each programming language
+#### - `.gitignore` File
+```gitignore
+# add all output files and build files to be excluded from git tracking
+main     # executable file also must have the project name
+target/  # the build file, for example for rust
+```
+
+#### - Build File / Specification File / Configuration File
+It can be any of the following ones
+- **C/C++**: `Makefile`
+- **Python**: `requirements.txt`
+- **JavaScript**: `package.json` and `package-lock.json`
+- **Rust**: `Cargo.toml` and `Cargo.lock`
+- **Go**: `go.mod`
+
+### - Source Code File
+
+The source code files, should either be in `src/` folder (**Eg.** `src/main.cpp` or `src/main.js`) or the root folder (**Eg.** `palindrome.go` or `App.java`) where `ext` is the file extension for the specific programming language.
+
+Again, the source codes must conform to a valid file structure convention that the programming language enforces.
+
+### **2. Naming Convention**
+
+The programming should keep the naming convention rule of each programming language.
 
 ### Other topic
 - [First-time contribution](CONTRIBUTING.md)