let print_student_latex_in_table_by_resp (hpr:string -> unit) stu padd = 
      hpr (Printf.sprintf "\\rule[-1mm]{0pt}{5mm}%s & %s\n" 
        (resp_to_full_string (student_resp stu padd))
        (color_string_latex (student_absc stu padd) stu.login));
      hpr "&\\rule{3pt}{0pt}&\\rule{3pt}{0pt}&\\rule{3pt}{0pt}\n";
      hpr "&\\rule{3pt}{0pt}&\\rule{3pt}{0pt}&\\rule{3pt}{0pt}\n";
      hpr "&\\rule{3pt}{0pt}&\\rule{3pt}{0pt}&\\rule{3pt}{0pt}& \\\\\\hline\n"