They literally posted the algorithm they used to calculate difficulty in the OP. While it may not be 100% accurate, it is likely more reliable than people’s impressions from personal experience, which tends to be awkwardly subjective.
They literally posted the algorithm they used to calculate difficulty in the OP. While it may not be 100% accurate, it is likely more reliable than people’s impressions from personal experience, which tends to be awkwardly subjective.