1    	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2    	/*                                                                           */
3    	/*                  This file is part of the program and library             */
4    	/*         SCIP --- Solving Constraint Integer Programs                      */
5    	/*                                                                           */
6    	/*  Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB)                      */
7    	/*                                                                           */
8    	/*  Licensed under the Apache License, Version 2.0 (the "License");          */
9    	/*  you may not use this file except in compliance with the License.         */
10   	/*  You may obtain a copy of the License at                                  */
11   	/*                                                                           */
12   	/*      http://www.apache.org/licenses/LICENSE-2.0                           */
13   	/*                                                                           */
14   	/*  Unless required by applicable law or agreed to in writing, software      */
15   	/*  distributed under the License is distributed on an "AS IS" BASIS,        */
16   	/*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
17   	/*  See the License for the specific language governing permissions and      */
18   	/*  limitations under the License.                                           */
19   	/*                                                                           */
20   	/*  You should have received a copy of the Apache-2.0 license                */
21   	/*  along with SCIP; see the file LICENSE. If not visit scipopt.org.         */
22   	/*                                                                           */
23   	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24   	
25   	/**@file   heur_zeroobj.h
26   	 * @ingroup PRIMALHEURISTICS
27   	 * @brief  heuristic that tries to solve the problem without objective. In Gurobi, this heuristic is known as "Hail Mary"
28   	 * @author Timo Berthold
29   	 */
30   	
31   	/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
32   	
33   	#ifndef __SCIP_HEUR_ZEROOBJ_H__
34   	#define __SCIP_HEUR_ZEROOBJ_H__
35   	
36   	#include "scip/def.h"
37   	#include "scip/type_heur.h"
38   	#include "scip/type_result.h"
39   	#include "scip/type_retcode.h"
40   	#include "scip/type_scip.h"
41   	
42   	#ifdef __cplusplus
43   	extern "C" {
44   	#endif
45   	
46   	/** creates the zeroobj primal heuristic and includes it in SCIP
47   	 *
48   	 *  @ingroup PrimalHeuristicIncludes
49   	 */
50   	SCIP_EXPORT
51   	SCIP_RETCODE SCIPincludeHeurZeroobj(
52   	   SCIP*                 scip                /**< SCIP data structure */
53   	   );
54   	
55   	/**@addtogroup PRIMALHEURISTICS
56   	 *
57   	 * @{
58   	 */
59   	
60   	/** main procedure of the zeroobj heuristic, creates and solves a sub-SCIP */
61   	SCIP_EXPORT
62   	SCIP_RETCODE SCIPapplyZeroobj(
63   	   SCIP*                 scip,               /**< original SCIP data structure                                        */
64   	   SCIP_HEUR*            heur,               /**< heuristic data structure                                            */
65   	   SCIP_RESULT*          result,             /**< result data structure                                               */
66   	   SCIP_Real             minimprove,         /**< factor by which zeroobj should at least improve the incumbent       */
67   	   SCIP_Longint          nnodes              /**< node limit for the subproblem                                       */
68   	   );
69   	
70   	/** @} */
71   	
72   	#ifdef __cplusplus
73   	}
74   	#endif
75   	
76   	#endif
77