1822. Sign of the Product of an Array
Easy
There is a function
signFunc(x) that returns:1ifxis positive.-1ifxis negative.0ifxis equal to0.
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
func arraySign(nums []int) int {
neg := 0
for _, n := range nums {
if n == 0 { return 0 }
if n < 0 { neg++ }
}
if neg % 2 == 0 {
return 1
}
return -1
}