diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/points_and_vertices.cin b/Polyline_simplification_2/examples/Polyline_simplification_2/points_and_vertices.cin
old mode 100755
new mode 100644
diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify.cin b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify.cin
old mode 100755
new mode 100644
diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polygon.cin b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polygon.cin
old mode 100755
new mode 100644
diff --git a/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polyline.cin b/Polyline_simplification_2/examples/Polyline_simplification_2/simplify_polyline.cin
old mode 100755
new mode 100644
diff --git a/Polyline_simplification_2/test/Polyline_simplification_2/simplify_polygon.cmd b/Polyline_simplification_2/test/Polyline_simplification_2/simplify_polygon.cmd
old mode 100755
new mode 100644