#include <mtl/dense1D.h>#include <mtl/mtl.h>#include <mtl/utils.h>/*  example output:  [12,12,12,12,12,12,12,12,12,12]  */intmain(){  using namespace mtl;  //begin  dense1D<double> x(20,1), y(10,4), z(10);  ele_mult(strided(scaled(x,3),2), y, z);  //end  print_vector(z);  return 0;}