There is a function `signFunc(x)` that returns:

- `1` if `x` is positive.
- `-1` if `x` is negative.
- `0` if `x` is equal to `0`.

You are given an integer array `nums`. Let `product` be the product of all values in the array `nums`.

Return `signFunc(product)`.

Example 1:

    Input: nums = [-1,-2,-3,-4,3,2,1]
    Output: 1
    Explanation: The product of all values in the array is 144, and signFunc(144) = 1

Example 2:

    Input: nums = [1,5,0,2,-3]
    Output: 0
    Explanation: The product of all values in the array is 0, and signFunc(0) = 0

Example 3:

    Input: nums = [-1,1,-1,1,-1]
    Output: -1
    Explanation: The product of all values in the array is -1, and signFunc(-1) = -1

Constraints:

- `1 <= nums.length <= 1000`
- `-100 <= nums[i] <= 100`