#include <iostream> // For writing to the standard output.
#include <fstream> // For reading input files.

#include "graph.hpp"
#include "edmonds.h"

int main(int argc, char** argv)
{
   if (argc != 2)
   {
      std::cout << "Expected one argument, found " << argc - 1 << std::endl;
      return EXIT_FAILURE; // return 1 would do the same, but is way too easy to mix up!
   }

   std::fstream input_file_graph{argv[1]};
   if (not input_file_graph.is_open()) {
      throw std::runtime_error(std::string("Could not open file for reading: ") + argv[1]);
   }
   ED::Graph graph = ED::Graph::read_dimacs(input_file_graph);

   // Now, calculate the matching
   ED::Graph optimum_matching = Edmonds::maximum_matching(graph);
   std::cout << optimum_matching;
   return EXIT_SUCCESS; 
}