I've posted a few blogs since early December 2023. I'll define the difficulty level of the blogs with the below scale.

The difficulty level of my blogs are as follows:

Easy — solved within 1.5 hours

Medium — solved within 2~4 hours

Hard — not solved and peeked at the solution

Sleep — completely out my skill range, took me a 1/2 days to understand the solution

Note that these are my personal opinions on the problems' difficulty.

It differs from person to person since some people are just better at certain topics.