README.md

1822. Sign of the Product of an Array

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

Solutions (Ruby)

1. Solution

# @param {Integer[]} nums
# @return {Integer}
def array_sign(nums)
  sign = 1

  nums.each do |x|
    return 0 if x == 0

    sign *= -1 if x < 0
  end

  sign
end

Solutions (Rust)

1. Solution

impl Solution {
    pub fn array_sign(nums: Vec<i32>) -> i32 {
        let mut sign = 1;

        for x in nums {
            if x == 0 {
                return 0;
            } else if x < 0 {
                sign *= -1;
            }
        }

        sign
    }
}