How long until you were "proficient" at leetcode
Please don't poison the well with "I did 5 questions and got L5 at google".
I'm on month 2 of LC with about 50 questions complete. However, I don't think I'm prepared for an interview. At what number did you begin feeling confident in your ability to solve within 30 mins.
Bonus points if you've got any tips to help with avoiding silly mistakes like out of bounds indexing and off-by-one logic errors.