How to automatically pick up signs to get the right number?

Question

Algorithms

Hello.
There are n numbers, and there is a number that should be obtained after the operations of all these n numbers, how to choose the signs?
For example, there are numbers 2,3,4,5, and the final number is 28, we must carry out a checkmate operation with these numbers in order to get 28
Options:
(2 * 5-3) * 4
, etc.
This thought has been tormenting me for a long time, there is only overkill how else is it possible?

Answer 1

You can also look at the answer or ask here.
And so the problem is NP-complete, bust.

Answer 2

will you break bitcoin? buy on the fork, then people will show)))