I came across this version of the EGZ theorem used in different proofs:
Any set of 2N−1 integers, has a subset of size exactly N, such that the sum of elements of that set is divisible by N.
However the first version of the theorem is as stated in this link: Erdös-Ginzburg-Ziv theorem
I can't understand if this version is correct or not, because it feels like that this one is just a wrong interpretation of EGZ theorem and misunderstood as EGZ itself.
Plz tell me that is this theorem wrong?
And if its rigt then how can I deduce it from EGZ theorem?