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#ifndef _KGRAPH_H
#define _KGRAPH_H
#include <cassert>
#include <cstdlib>
#include <iostream>
using namespace std;
class K_PARTITION;
class K_GRAPH
{
unsigned long num_vertices; // number of vertices
unsigned long* vertex_ID; // array of ID's of vertices
int** edges; // adjacency matrix
unsigned long ref_count;
// stream
ostream& output(ostream&) const;
// primitives
unsigned long ID_to_index(const unsigned long) const;
int add_edge(const unsigned long, const unsigned long, const int);
int del_edge(const unsigned long, const unsigned long);
int DFS(const unsigned long, int* const, long* const, const unsigned long);
int DFS_for_PC(const unsigned long, int* const, int* const, const int);
public:
K_GRAPH();
K_GRAPH(const unsigned long n);
K_GRAPH(const unsigned long n, const unsigned long* const V);
K_GRAPH(const K_GRAPH&);
K_GRAPH& operator =(const K_GRAPH&);
~K_GRAPH();
// stream
friend ostream& operator <<(ostream&, const K_GRAPH&);
// other functions
K_GRAPH gen_subgraph(const unsigned long, const unsigned long* const);
unsigned long get_connected_components(long*&, K_GRAPH*&);
int propagate_color(const unsigned long, int*&, const int);
friend unsigned long gen_adjacency(K_PARTITION** const, const unsigned long,
K_GRAPH*&,
long*&, K_GRAPH*&);
};
#endif
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