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diff --git a/extern/quadriflow/3rd/lemon-1.3.1/demo/arg_parser_demo.cc b/extern/quadriflow/3rd/lemon-1.3.1/demo/arg_parser_demo.cc
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+/* -*- mode: C++; indent-tabs-mode: nil; -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library.
+ *
+ * Copyright (C) 2003-2010
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+///\ingroup demos
+///\file
+///\brief Argument parser demo
+///
+/// This example shows how the argument parser can be used.
+///
+/// \include arg_parser_demo.cc
+
+#include <lemon/arg_parser.h>
+
+using namespace lemon;
+int main(int argc, char **argv)
+{
+  // Initialize the argument parser
+  ArgParser ap(argc, argv);
+  int i;
+  std::string s;
+  double d = 1.0;
+  bool b, nh;
+  bool g1, g2, g3;
+
+  // Add a mandatory integer option with storage reference
+  ap.refOption("n", "An integer input.", i, true);
+  // Add a double option with storage reference (the default value is 1.0)
+  ap.refOption("val", "A double input.", d);
+  // Add a double option without storage reference (the default value is 3.14)
+  ap.doubleOption("val2", "A double input.", 3.14);
+  // Set synonym for -val option
+  ap.synonym("vals", "val");
+  // Add a string option
+  ap.refOption("name", "A string input.", s);
+  // Add bool options
+  ap.refOption("f", "A switch.", b)
+    .refOption("nohelp", "", nh)
+    .refOption("gra", "Choice A", g1)
+    .refOption("grb", "Choice B", g2)
+    .refOption("grc", "Choice C", g3);
+  // Bundle -gr* options into a group
+  ap.optionGroup("gr", "gra")
+    .optionGroup("gr", "grb")
+    .optionGroup("gr", "grc");
+  // Set the group mandatory
+  ap.mandatoryGroup("gr");
+  // Set the options of the group exclusive (only one option can be given)
+  ap.onlyOneGroup("gr");
+  // Add non-parsed arguments (e.g. input files)
+  ap.other("infile", "The input file.")
+    .other("...");
+
+  // Throw an exception when problems occurs. The default behavior is to
+  // exit(1) on these cases, but this makes Valgrind falsely warn
+  // about memory leaks.
+  ap.throwOnProblems();
+
+  // Perform the parsing process
+  // (in case of any error it terminates the program)
+  // The try {} construct is necessary only if the ap.trowOnProblems()
+  // setting is in use.
+  try {
+    ap.parse();
+  } catch (ArgParserException &) { return 1; }
+
+  // Check each option if it has been given and print its value
+  std::cout << "Parameters of '" << ap.commandName() << "':\n";
+
+  std::cout << "  Value of -n: " << i << std::endl;
+  if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;
+  if(ap.given("val2")) {
+    d = ap["val2"];
+    std::cout << "  Value of -val2: " << d << std::endl;
+  }
+  if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;
+  if(ap.given("f")) std::cout << "  -f is given\n";
+  if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << nh << std::endl;
+  if(ap.given("gra")) std::cout << "  -gra is given\n";
+  if(ap.given("grb")) std::cout << "  -grb is given\n";
+  if(ap.given("grc")) std::cout << "  -grc is given\n";
+
+  switch(ap.files().size()) {
+  case 0:
+    std::cout << "  No file argument was given.\n";
+    break;
+  case 1:
+    std::cout << "  1 file argument was given. It is:\n";
+    break;
+  default:
+    std::cout << "  "
+              << ap.files().size() << " file arguments were given. They are:\n";
+  }
+  for(unsigned int i=0;i<ap.files().size();++i)
+    std::cout << "    '" << ap.files()[i] << "'\n";
+
+  return 0;
+}