HELP ME! URI 1323 - C#

Question

H"how many different squares are there in a grid of N ×N squares?".

In the same napkin there was a drawing which is reproduced below, showing that, for N=2, the answer is 5.
INPUT AND OUTPUT 👇
https://sololearn.com/discuss/3096764/?ref=app

How can I resolve this?🤔😰

Answer 1

We cannot see the linked page without a login.

Seems like a question that should be asked on the beecrowd forum rather than here.