gabrielfoo's first attempt

[gabrielfoo]

Check List:

• [x] Tests pass (./test.sh <username> shows no differences between expected and actual outputs)

• [x] All formatting changes by the build are committed

• [x] Your launch script is named calculate_average_<username>.sh (make sure to match casing of your GH user name) and is executable

• [x] Output matches that of calculate_average_baseline.sh

• [x] For new entries, or after substantial changes: When implementing custom hash structures, please point to where you deal with hash collisions (NA: I'm using Java's Strings and HashMap)

• Execution time: 10s

• Execution time of reference implementation: 4 mins ~

[gunnarmorling]

Please run mvn verify and amend the commit with the changes applied by the code formatter. Thx!

[gabrielfoo]

@gunnarmorling Done.

[gunnarmorling]

00:11.406.