// -*- c++ -*-

#include <iostream>

#include <fstream>

#include <list>

#include <lemon/dimacs.h>

#include <bfs_dfs_misc.h>

#include <sage_graph.h>

#include <lemon/graph_wrapper.h>

#include <lemon/maps.h>

#include <for_each_macros.h>

using namespace lemon;

using std::cout;

using std::endl;

int main() {

  typedef SageGraph Graph;

  Graph g;

  readDimacs(std::cin, g); 

  {

    std::list<Graph::Node> l;

    //NullMap<Graph::Node, Graph::Edge> pred;

    Graph::NodeMap<Graph::Edge> pred(g, INVALID);

    topSort(g, l, pred);

    cout << "Leaving order of dfs which is pretopological..." << endl;

    for(std::list<Graph::Node>::const_iterator i=l.begin(); i!=l.end(); ++i) {

      cout << *i << " ";

    }

    cout << endl;

    FOR_EACH_LOC(Graph::NodeIt, n, g) {

      cout << "pred of node " << n << " is " << pred[n] << endl;

    }

  }

  {

    typedef RevGraphWrapper<Graph> GW;

    GW gw(g);

    std::list<GW::Node> l;

    //NullMap<GW::Node, GW::Edge> pred;

    GW::NodeMap<Graph::Edge> pred(gw, INVALID);

    topSort(gw, l, pred);

    cout << "Same in the reversed oriented graph..." << endl;

    for(std::list<GW::Node>::const_iterator i=l.begin(); i!=l.end(); ++i) {

      cout << *i << " ";

    }

    cout << endl;

    FOR_EACH_LOC(GW::NodeIt, n, gw) {

      cout << "pred of node " << n << " is " << pred[n] << endl;

    }

  }

  return 0;

}