Program Listing for File FifteenPuzzle.h

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/*--------------------------------------------------------------------------*/
/*-------------------------- File FifteenPuzzle.h --------------------------*/
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/*----------------------------- DEFINITIONS --------------------------------*/
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#ifndef __ADS_FifteenPuzzle
 #define __ADS_FifteenPuzzle
                      /* self-identification: #endif constant */

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/*------------------------------ INCLUDES ----------------------------------*/
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#include "ADS/Contract.h"
#include "ADS/priority/FibonacciHeapPriorityQueue.h"

#include <cstdlib>
#include <map>
#include <type_traits>
#include <optional>
#include <queue>
#include <set>
#include <vector>

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/*--------------------------- NAMESPACE ------------------------------------*/
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namespace ADS {

using Board = std::vector< int >;

inline Board puzzleGoal( int n );

inline int manhattan( const Board & B , int n );

inline std::vector< Board > puzzleMoves( const Board & B , int n );

inline Board puzzleSpiralGoal( int n );

inline std::optional< std::vector< Board > > puzzleBFS(
                        const Board & B , const Board & goal , int n ,
                        long * visited = nullptr );

inline std::optional< std::vector< Board > > puzzleDFS(
                        const Board & B , const Board & goal , int n ,
                        int nmax );

inline bool solvable( const Board & B , int n );

template< class Map = std::map< Board , int > >
std::optional< std::vector< Board > > solvePuzzle( const Board & B , int n ,
                                                   long * visited = nullptr );

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}  // end( namespace ADS )

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/*-------------------------- IMPLEMENTATION --------------------------------*/
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#include "ADS/intractable/impl/FifteenPuzzle.tpp"

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#endif  /* FifteenPuzzle.h included */

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/*------------------------ End File FifteenPuzzle.h ------------------------*/
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