# https://leetcode.com/problems/sign-of-the-product-of-an-array/description/
"""
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
"""


def array_sign(nums: list[int]) -> int:
    counter = 0
    for n in nums:
        if n == 0:
            return 0
        elif n < 0:
            counter += 1
    return 1 if counter % 2 == 0 else -1
