Recently, I have been searching for some articles about "Smaller to larger" technique on Google, but ended up finding nothing really useful (only the first 2 pages mention about it but they are all about Sack(dsu on tree) :> ...).

So could you guys show me some good documents about that technique and provide me as many as problems you guys have come across during your coding journey? <3

P/s: or share your way of understanding and applying this technique, if you could <3.

Thanks so much and have a great day <3.