what is the command line that sololearn uses to compile c ++

Question

I have a code that contains template <class T, class U, class Y> and I do not have the need to place it <int, double, int> to use it, but in PC I use this code and I get "error: missing template arguments before 'a' ".
For that reason I want to know the line of code that sololearn uses to use it in pc so that this error does not leave me. Sorry for the English but I am using google translator
https://code.sololearn.com/cblUylgDi3xw/?ref=app

Answer 1

Its hard help without see the code

P.S. please set a valid username