+//extern double vertex_areas[N], edge_lengths[N][V6];
+extern double vertex_mean_edge_lengths[N];
+
+extern const double edge_angle_cost_circcircrat;
+
+double vertex_displacement_cost(const Vertices vertices, int section);
+double vertex_edgewise_displ_cost(const Vertices vertices, int section);
+double line_bending_cost(const Vertices vertices, int section);
+double noncircular_rim_cost(const Vertices vertices, int section);
+double edge_length_variation_cost(const Vertices vertices, int section);
+double prop_edge_length_variation_cost(const Vertices vertices, int section);
+double rim_proximity_cost(const Vertices vertices, int section);
+double rim_twist_cost(const Vertices vertices, int section);
+double edge_angle_cost(const Vertices vertices, int section);
+double small_triangles_cost(const Vertices vertices, int section);
+double nonequilateral_triangles_cost(const Vertices vertices, int section);
+
+extern const char *input_file, *best_file;
+extern char *best_file_tmp;
+extern long long evaluations;
+extern double stop_epsilon;