brev=wit

brevity is talent's sister

I'm laughing so hard, this is a brilliant solution

Is 4+1=5
and 4-1=3
Your array dont contain 3 or 5
It's false

This is not a general solution!

As a software Engineer I realised, I need to know literature more than before to undestand what your question says :|

[1, 1, 1, 1, 2, 4, 4]
res = true

expected:<true> but was:<false>
:|

Still, this is the less poorly explained kata from this user.

There is no need for two loops :)

Genius

Am I a Coder or Physicist? :|

"i" can not be "0"! because I used IntStream which starts from "1"
IntStream.range(1, arr.length)

your solution would fail if

i==0 and a[i]==0

That was awesome but time complexity!