Hello, I need your help. Please how to convert vector a1 to 2d vector a4?

Question

https://code.sololearn.com/cu0DGUXKPzQc/?ref=app

Answer 1

If you run the code you can see what is expected to get. <a1> is vector with rearraged elements from vector <a>. Now I would like to get 2d vector <a4> with elements of vector <a1>.
This vector <a4> should have 10 rows and 3 columns.

Answer 2

Ok I added a block using nested for...loop copying data from <a1> to <a4>.

Answer 3

Amazing, thank you.

Answer 4

Can you show me a data example for <a1>, and how <a4> should look like after the conversion?

Answer 5

https://code.sololearn.com/cz8s92qEvgMd/?ref=app

Answer 6

Is there any simplier way with for loops?

Answer 7

Are you not allowed to use built-in algorithm functions?

Answer 8

Your solution is correct, but I haven't learned the iterators yet.