Average Value of Even Numbers That Are Divisible by Three Python/Java solution

In Python or Java, iterate through the array and check num % 6 == 0. Maintain sum and count variables, update them for each valid element, and return sum // count (or sum / count depending on language rules) if count is non-zero; otherwise return 0.

What is the best approach for Average Value of Even Numbers That Are Divisible by Three?

The best approach is a single-pass iteration over the array. Track the sum and count of numbers divisible by 6, since divisibility by both 2 and 3 implies divisibility by 6. This solution runs in O(n) time and O(1) space and is typically expected in interviews.

Is Average Value of Even Numbers That Are Divisible by Three asked at Google/Amazon/Meta?

This exact problem may appear on practice platforms like LeetCode as an easy-level exercise. Variations involving filtering arrays and computing aggregates are common in coding screens at companies like Amazon and Google because they test basic array traversal and condition checks.

What data structure is used in Average Value of Even Numbers That Are Divisible by Three?

The problem primarily uses an array as the input data structure. The algorithm performs a linear scan over the array and maintains simple scalar variables for sum and count, without requiring additional data structures.

What is the time complexity of Average Value of Even Numbers That Are Divisible by Three?

The optimal solution runs in O(n) time where n is the length of the array. Each element is checked once for the condition num % 6 == 0. Space complexity is O(1) because only two variables (sum and count) are maintained.

Description Hints 2 Solution Video 1:58

2455. Average Value of Even Numbers That Are Divisible by Three

Q: Is Average Value of Even Numbers That Are Divisible by Three easy or hard?

Average Value of Even Numbers That Are Divisible by Three is classified as an Easy problem. It focuses on basic array traversal, simple divisibility checks, and maintaining running totals, making it suitable for beginners practicing array and math fundamentals.

Q: How to solve Average Value of Even Numbers That Are Divisible by Three in O(n)?

Iterate through the array once and check if each element satisfies num % 6 == 0. If it does, add it to a running sum and increment a counter. After the loop, return sum / count if count is greater than zero; otherwise return 0.

Easy63.6% acceptance2 companies

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 <= 1000
1 <= nums[i] <= 1000

Asked at 2 companies

IBM

Google

Topics

Array Math

Hints open one at a time

Hint 1

What is the property of a number if it is divisible by both 2 and 3 at the same time?

Hint 2

It is equivalent to finding all the numbers that are divisible by 6.

1:58

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