All excercises
test push
Merge branch 'HW1' of https://github.com/HungUnicorn/aim3 into HW1

HW2
HW2-GraphMining with Flink
update comment
update comment
Update FilteringWordCount.java
update comment
update comment
update comment
Merge branch 'HW1' of https://github.com/HungUnicorn/aim3 into HW1
Merge pull request #1 from HungUnicorn/HW1

Hw2