How to modify the function condition?

Question

css

There is a script that outputs a block with the class name rsya after the 3rd h2 subheading:

<script>
$(function(){
   var insert_after = 3;
   var n =   parseInt($(".box_in h2").length);
   if (n >= insert_after){
       $($(".box_in h2")[insert_after]).after($(".rsya"));
   };
});
</script>

How to refine the function so that it does not work if the number of h2 subheadings in the document is less than 3?

Answer 1

As suggested in the comments: move the inputs themselves to the beginning of the general wrapper and change the selectors a bit:
And in the future, please post all the code in the sandbox.

Answer 2

https://jsfiddle.net/mb4Lf1ja/