IMC Trading Software Engineer Intern interview questions

So i met IMC representatives at the career fair. I spoke to them and handed them my resume. They contacted me 2 days later sending me two problems attached to an email. They told me to send the solutions within 2 days (which is pretty tight). They however, apologized for the tight deadline and told me that this was their way of screening people. I don't think it was required though. Only recommended. So I solved them and handed in the solutions in due time and the asked me for a first round interview in a week. In the first round interview they asked me to solve a problem which was fairly easy.I will describe those below. They told me they'll announce if I will be accepted for a second round interview soon. I'll update you once I know more.