Given an integer array nums of positive integers, return the average value of all even integers that are divisible by 3.
Note that the average of n elements is the sum of the n elements divided by n and rounded down to the nearest integer.
Example 1:
Input: nums = [1,3,6,10,12,15] Output: 9 Explanation: 6 and 12 are even numbers that are divisible by 3. (6 + 12) / 2 = 9.
Example 2:
Input: nums = [1,2,4,7,10] Output: 0 Explanation: There is no single number that satisfies the requirement, so return 0.
Constraints:
1 <= nums.length <= 10001 <= nums[i] <= 1000