38 lines
854 B
C++
38 lines
854 B
C++
DisjSets.h - Header file for disjoint sets algorithms
|
|
|
|
#ifndef DISJ_SETS_H
|
|
#define DISJ_SETS_H
|
|
|
|
// DisjSets class
|
|
//
|
|
// CONSTRUCTION: with int representing initial number of sets
|
|
//
|
|
// ******************PUBLIC OPERATIONS*********************
|
|
// void union( root1, root2 ) --> Merge two sets
|
|
// int find( x ) --> Return set containing x
|
|
// ******************ERRORS********************************
|
|
// No error checking is performed
|
|
|
|
#include <vector>
|
|
using namespace std;
|
|
|
|
/**
|
|
* Disjoint set class.
|
|
* Use union by rank and path compression.
|
|
* Elements in the set are numbered starting at 0.
|
|
*/
|
|
class DisjSets
|
|
{
|
|
public:
|
|
explicit DisjSets( int numElements );
|
|
|
|
int find( int x ) const;
|
|
int find( int x );
|
|
void unionSets( int root1, int root2 );
|
|
|
|
private:
|
|
vector<int> s;
|
|
};
|
|
|
|
#endif
|