Created or Edited -> Deletion of row

i = 0;
for each  rec in input.Product_Details
{
	if(rec.S_NO != row.S_NO)
	{
		i = i + 1;
		rec.S_NO=i;
	}
}
 //Another Deletion of row code for S_No below
for each  r in input.Returnable_Packing_Material
{
	b = r.S_No - 1;
	r.S_No=b;
	if(r.S_No < row.S_No)
	{
		b = b + 1;
		r.S_No=b;
	}
}