/**
* Implement a function that takes an array of positive and negative numbers. Return an array where the first element is the count of negative numbers and the second element is the sum of positive numbers.
*
* If given an empty array, return an empty array: []
* 0 is positive.
*
* Examples:
countAndSum([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, -11, -12, -13, -14, -15]) ➞ [5, 55]
// There are a total of 5 negative numbers.
// The sum of all positive numbers equals 55.
countAndSum([92, 6, 73, -77, 81, -90, 99, 8, -85, 34]) ➞ [3, 393]
countAndSum([91, -4, 80, -73, -28]) ➞ [3, 171]
countAndSum([]) ➞ []
*/
function countAndSum(arr) {
}
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