SCM make_lines (vector<Break_node> *breaks);
SCM make_pages (vector<Break_node> const &breaks, SCM systems);
void calc_subproblem (vsize i);
SCM make_lines (vector<Break_node> *breaks);
SCM make_pages (vector<Break_node> const &breaks, SCM systems);
void calc_subproblem (vsize i);