At first, I received 3 problems for 2 weeks. I solved them and, after a month, received a new problem set. I submitted it as well, and the recruiter scheduled a phone interview. However, at the specified time, nobody called.

I asked the recruiter, and she said something like, "Our developers were too busy to interview you, and all intern positions are already filled, but your work was highly graded."

I wasted a lot of time for nothing.

Split a convex polygon into four parts of equal area using two perpendicular cuts.