Amphibian.com

Okay, I know this joke might be a bit difficult for non-computer science people. To achieve O(log n) time complexity, each iteration of your algorithm working with the set n should consider smaller and smaller subsets of n. For example, guessing a number between 1 and 100 when an incorrect guess gives you a hint "higher" or "lower." Start by guessing 50. To high? Guess 25. Too low? Guess 38. Each time, the range of numbers you have to consider gets smaller.

That's why the Log says that each challenge is easier than the one before it. You can laugh now. Or not. Come back Monday and maybe the jokes will be better.