Hide node labels for large graphs

scripts/draw_solution.sage

@@ -80,6 +80,7 @@ text_offset = vector([0,-1]) * max_x * 0.02
 plot = plot + sum([line([all_points[edges[k][0]], all_points[edges[k][1]]],
         color=white.blend(red, 0.1 + 0.9 * edges[k][2])) for k in range(edges_count)])
 
+if node_count < 30:
     for i in range(node_count):
         plot = plot + text(str(i), all_points[i] + text_offset, color='gray')