LeetCode in Kotlin

1822. Sign of the Product of an Array

Easy

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

Solution

class Solution {
    fun arraySign(nums: IntArray): Int {
        var negativeCount = 0
        for (num in nums) {
            if (num == 0) {
                return 0
            } else if (num < 0) {
                negativeCount++
            }
        }
        return if (negativeCount % 2 == 0) 1 else -1
    }
}

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