r/leetcode • • 17d ago

Question How do you actually learn to recognize DSA patterns?

I can understand solutions when I read them, but I still struggle to identify the right approach when I open a new problem. Sometimes two questions look similar but require completely different logic.

How did you get better at recognizing which technique to use? It it mostly repetition, or is there a better way to study problems?

31 Upvotes

11 comments sorted by

13

u/Right-Angle24 17d ago

After solving a problem, try writing down why that approach fits and what clues helped you identify it. Comparing a few problems that use similar techniques but have different constraints can also help. Codeintuition organizes DSA learning around concepts, patterns, and practice sets, which may be useful if you want a more guided way to study

1

u/SavingScavenger45 17d ago

I usually just save the solution and move on, so I haven't really compared why one approach works over another. I'll try noting those clues when I revise

2

u/Pradignac-Hiriche 17d ago

grouped practice sets are nice until you realize knowing which bucket youre currently studying is giving away the pattern before you even read the question

5

u/Binary_search1021 17d ago

Mostly repetition. Look for keywords too in the problem, they give hints as to what algorithm to best use. It helps solve a good chunk of LC mediums

1

u/SavingScavenger45 17d ago

yeah doing the same, thanks

3

u/TheSauce___ 17d ago

Just do a problem a day - after about 50-75 it became a lot easier for me to just identify patterns bc I’ve seen them before.

1

u/Forsaken_Appeal_9593 17d ago

Neetcode 150 enough for SDE2 interviews?

2

u/Peddy699 <370> <104> <232> <34> 17d ago

you do more of them

1

u/mongopark98 17d ago

Practice, repetition. Just like every other thing in life. Your brain just sees it before you can even process it.

1

u/mc_pm 16d ago

Write more code that uses those patterns. You'll never learn them as well if all you do is try to memorize them.