negative values for the LWE scheme

[JackeyNgKY]

Firstly, thanks for the library which helps me a lot in my coursework.

I'm sorry if this is naive question as I'm new to the functional encryption. Is it possible to support negative values in LWE scheme?

[JackeyNgKY]

I just found that if I remove % key.p from the example, the negative value can be supported.

[Example from the Readme]
from mife.single.selective.lwe import FeLWE

n = 10
x = [i - 10 for i in range(n)]
y = [i for i in range(n)]
key = FeLWE.generate(n, 4, 4)
c = FeLWE.encrypt(x, key)
sk = FeLWE.keygen(y, key)
m = FeLWE.decrypt(c, key.get_public_key(), sk) % key.p