update README.md

Author: fishercoder1534

README.md

@@ -17,6 +17,13 @@ Your ideas/fixes/algorithms are more than welcome!
 6. Push to the branch (`git push origin my-awesome-feature`)
 7. Open your forked repo on Github website, create a new Pull Request to this repo!
 
+## Best way to open this project
+
+1. Install Intellij on your machine, either CE or UE.
+2. git clone this repo to your local disk
+3. import this project as a new project (does not need to be a gradle project)
+4. If you run into "Could not determine Java version using executable ..." error, use local gradle distribution: "/usr/local/Cellar/gradle/4.8.1/libexec/" instead of the default one. More details, see [Stackoverflow](https://stackoverflow.com/questions/52195643/cannot-find-symbol-intellij-gradle/52196069#52196069).
+
 
 ## Algorithms