A challenge in Python. How to slove this?

Question

You have k apple boxes full of apples. Each square box of size m contains m × m apples. You just noticed two interesting properties about the boxes:

1.--The smallest box is size 1, the next one is size 2,..., all the way up to size k.

2.--Boxes that have an odd size contain only yellow apples. Boxes that have an even size contain only red apples.

=> Challenge is to calculate the difference between the number of red apples and the number of yellow apples.

Example:
For k = 5, the output should be
appleBoxes(k) = -15.

There are 1 + 3 * 3 + 5 * 5 = 35 yellow apples and 2 * 2 + 4 * 4 = 20 red apples, making the answer 20 - 35 = -15.

Disclaimer:
- code must be written in python
- code must be in a function
- function must be named solution
- function must take a integer (k) as an argument
- function must return a integer
- no imports/libraries allowed

Answer 1

boxes = int(input())

def solution(k):
yellow = 0
red = 0

for m in range(1, k+1):
m = m*m
if m%2:
yellow +=m
else:
red +=m

print(red - yellow)

solution(boxes)

Answer 2

https://www.sololearn.com/discuss/1270852/?ref=app

This challenge is not fit for the qna so please post it here

Answer 3

Can you post your attempt so we can see where your problem is.

I like the challenge but am hesitant to provide a full answer as it detracts from your learning experience.

Answer 4

This is not for "qna" I've tried solving this and can't find the answer of this so I'm just asking someone can help me to find this solution.
Thank You.