Why I choose Advent of Code:

• Python programming exercises: data manipulation, algorithm design, time optimization
• Problem solving exercises
• Great community resources on reddit
• A mix of easy, medium, and really difficult problems (you never know which one until you do it)
• Helps me develop a coding mindset so I can solve LeetCode/HackerRank/real-world challenges more effectively

I also have takeaway notes after solving the problems and try to frequently review them.