Why memoization needs more states than tabulation?

Revision en1, by Its_Saikat_19, 2024-02-22 12:39:52

Is there any case where memoization approach requires more states than tabulation?

I have heard that tabulation and memoization only differs by some memory efficiency and time efficiency.

But now I am facing a problem where the tabulation solution only needs a state, "amount". I tried to implement it using memoization but there I must keep track of the "index", otherwise it gives wrong answer.

https://cses.fi/problemset/result/8535002/

And it is clear that memoization not only needs extra state here but also is impossible with the given constraints.

Tags dp problem, memoization

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en4 English Its_Saikat_19 2024-02-25 14:09:54 321
en3 English Its_Saikat_19 2024-02-25 14:04:27 54
en2 English Its_Saikat_19 2024-02-22 12:47:57 196
en1 English Its_Saikat_19 2024-02-22 12:39:52 618 Initial revision (published)