I have a set of problems to analyze from a programming contest. My work is to rate the question according to its difficulty (easy,medium,hard) by analyzing the
accepted solutions rate and
failed solutions rate of the participants. Do I need any more parameters to analyze the difficulty and which algorithm should I use?
What if a problem with highest difficulty has no submissions at all? How can this case be evaluated?
About the contest
It is an online competitive programming contest like ACM ICPC. Questions are available to all the participants (all questions). They can start from any question. There will be 10-12 questions max. There is no submission limit for the questions. You can submit until your answer gets accepted.