Count Negative

Given an array arr of numbers, return the count of elements strictly less than 0.

Examples

Input: arr = [-1, 0, 1]
Output: 1

Input: arr = [-2, -5, -7]
Output: 3

Input: arr = [0, 2, 3]
Output: 0

Input: arr = []
Output: 0

Input: arr = []
Output: 0
countNegatives([-1, 0, 1]) // 1
countNegatives([-2, -5, -7]) // 3
countNegatives([0, 2, 3]) // 0
countNegatives([]) // 0
countNegatives(null)        // false
countNegatives(undefined)   // false
countNegatives(42)          // false
countNegatives("8")         // false
countNegatives({})          // false
countNegatives(() => {})    // false

Constraints

• If input is not an array, return false.
• If the array contains any non-number values or non-finite numbers (NaN, Infinity, -Infinity), return false.
• An empty array is valid and should return 0.