I want to hold a local university competition soon, and I want to make a trial round, including some problems like A+B, sum of array, array reversal or something similar. I can prepare them by myself, but it would be great if there are any prepared archives with such problems, which I will be able to import to Polygon (or may be they are already there).

If someone knows something about it, please, tell us about it and where we can get it.