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/* $Id: ClpDualRowDantzig.hpp 1665 2011-01-04 17:55:54Z lou $ */
// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

#ifndef ClpDualRowDantzig_H
#define ClpDualRowDantzig_H

#include "ClpDualRowPivot.hpp"

//#############################################################################

/** Dual Row Pivot Dantzig Algorithm Class

This is simplest choice - choose largest infeasibility

*/

class ClpDualRowDantzig : public ClpDualRowPivot {

public:

     ///@name Algorithmic methods
     //@{

     /// Returns pivot row, -1 if none
     virtual int pivotRow();

     /** Updates weights and returns pivot alpha.
         Also does FT update */
     virtual double updateWeights(CoinIndexedVector * input,
                                  CoinIndexedVector * spare,
                                  CoinIndexedVector * spare2,
                                  CoinIndexedVector * updatedColumn);
     /** Updates primal solution (and maybe list of candidates)
         Uses input vector which it deletes
         Computes change in objective function
     */
     virtual void updatePrimalSolution(CoinIndexedVector * input,
                                       double theta,
                                       double & changeInObjective);
     //@}


     ///@name Constructors and destructors
     //@{
     /// Default Constructor
     ClpDualRowDantzig();

     /// Copy constructor
     ClpDualRowDantzig(const ClpDualRowDantzig &);

     /// Assignment operator
     ClpDualRowDantzig & operator=(const ClpDualRowDantzig& rhs);

     /// Destructor
     virtual ~ClpDualRowDantzig ();

     /// Clone
     virtual ClpDualRowPivot * clone(bool copyData = true) const;

     //@}

     //---------------------------------------------------------------------------

private:
     ///@name Private member data
     //@}
};

#endif