I've done 250 LC but feel not fully prepared for unseen questions. Which of the following you think is best resource to improve understanding of data structures and algorithms ? If you choose Coursera courses on data structures, please specify in comments which ones. TC: None
Did you actually understand the 250 that you did?
I thought I did, but when I review I find that I can't do them
I'm still confused. Did you do them yourself, from scratch, without looking up solutions, and understand their time complexities? If so I can't imagine doing 250 and not feeling insanely prepared.
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Youve done 250? Choose one random and do it under 10 minutes. If you cant I am sorry to say you havent actually solved that problem
yup I tried and couldn't solve most the randoms I picked, so what could've gone wrong ?
It means you looked at the solution too quick and implemented without fully understanding. You solve a problem, then come back to try solve the exact same problem a week later to enhance your long term memory.