I am solving problem on codejam over the years with no definite pattern. I wondered all the problems are scattered and not easy to find the easiest problem. So I crawled all the problems and got the stats for each problem and put them in a database. Now I want to order them based on easiness. I choose to order them based on number of people solved the small input in descending order, this worked pretty well, all easy problems at top, but with one issue, In the years 2008,2009 number of people who attempted the problems is less, so a problem in 2008 solved by 3000 people could be easier than a problem in 2017 solved by 10000 people. Alternative approach I thought was asking coders to order, say to put a up and down button on each problem, if they press up button means they think it is easier than it appears in the list of problems, down button means otherwise. What do you think is the best strategy to order all the problems based on easiness/difficulty, so I can always solve easiest problem I didn't solve yet? (You can find all problems at www.manchik.co.uk/list to get an idea what I'm trying to do)
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