#include <iostream>
#include <string>
#include "edge.h"
using std::string;
using std::ostream;

edge::edge(const int v1, const int v2) {}
edge::edge(const int v1, const int v2, const double w) {}
edge::edge(const edge& e) {}
edge& edge::operator=(const edge& e) {}
bool edge::operator==(const edge& e) const {}
bool edge::operator!=(const edge& e) const {}