Bloomberg visited our school during the career fair. The entire interview process requires three days, with each day lasting approximately 30 minutes.

On the first two days, you will be given riddles or problems to solve using a programming language you know, or in C. The last interview is an HR interview.

The first two interviews will be stressful, as they simulate work conditions at the company. The last interview will be less stressful.

There are 8 balls. 7 of them are of the same weight. 1 ball is heavier than all the others. You are only given a basic balancing scale. Find out which ball is the heaviest one using the least number of comparisons.