Microsoft Student Developer interview questions

it was a home test using Codility. I got an email from the Microsoft recruiting team that has a link to the Codility website. On the website, I could see the rules for the following test that included 2 questions (I remember only one)

The interviewers were very nice, the proccess itself was pretty long. There was a phone interview, then a full day of online meatings (interviews) with different people were technical questions were asked