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#include <stdio.h>
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#include <string.h>
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#define BOX '*'
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#define WALL '#'
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#define MAN '8'
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#define PLATFORM '+'
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#define BOXINPLATFORM 'O'
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#define MANINPLATFORM 'E'
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#define BLANK ' '
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#define DIR_LEFT 'A'
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#define DIR_RIGHT 'B'
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#define DIR_UP 'C'
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#define DIR_DOWN 'D'
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#define MAX_X 50
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#define MAX_Y 50
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#define MAX_MOVES 50
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/* SOKOBAN Solution Finder
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*
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* Cerca totes les possibilitats de tots els nombres de combinacions possibles,
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* menys la que tots els moviments són a l'esquerra del número de combinacions
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* incials triat.
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*/
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struct Map
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{
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char Cells[MAX_X][MAX_Y];
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int SizeX, SizeY;
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int ManX, ManY;
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int NumPlatforms;
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int NumBoxesInPlatform;
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};
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void ReadMap(struct Map *M, char *FileName)
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{
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FILE *Fitxer;
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int i,j;
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if(!(Fitxer = fopen(FileName, "r")))
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{
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printf("Error opening %s!", FileName);
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exit(1);
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}
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M->SizeX=0;
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M->SizeY=0;
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while (!feof(Fitxer))
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{
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fgets(M->Cells[M->SizeY++], MAX_X, Fitxer);
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}
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M->SizeY--;
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M->SizeX = strlen(M->Cells[0]) - 1;
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M->NumPlatforms = 0;
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M->NumBoxesInPlatform = 0;
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for (j = 0; j<M->SizeY; j++)
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for (i=0; i<M->SizeX; i++)
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{
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if (M->Cells[j][i] == MAN)
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{ M->ManX = i; M->ManY = j; }
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else if (M->Cells[j][i] == PLATFORM)
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M->NumPlatforms++;
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else if (M->Cells[j][i] == BOXINPLATFORM)
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{
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M->NumPlatforms++;
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M->NumBoxesInPlatform++;
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}
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}
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}
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void ShowMap (struct Map *M)
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{
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int i,j;
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for (j = 0; j<M->SizeY; j++)
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{
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for (i=0; i<M->SizeX; i++)
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printf("%c", M->Cells[j][i]);
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printf("\n");
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}
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printf("Man is at (%i,%i)\n", M->ManX, M->ManY);
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printf("Platforms: %i, BoxesInPlatform: %i\n", M->NumPlatforms,
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M->NumBoxesInPlatform);
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}
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void CopyMap (struct Map *Mdest, struct Map *Morig)
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{
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memcpy((void *) Mdest, (void *) Morig, sizeof (struct Map));
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}
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int MoveMan (struct Map *M, int Direction)
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{
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int NewX, NewY;
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/*
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// Check if man is where it should be
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if (M->Cells[M->ManY][M->ManX] != MAN &&
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M->Cells[M->ManY][M->ManX] != MANINPLATFORM)
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{
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printf("Man isn't where it should be!\n");
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exit(2);
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}
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*/
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// Process Movement
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if (Direction == DIR_LEFT)
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{ NewX = M->ManX - 1; NewY = M->ManY; }
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else if (Direction == DIR_RIGHT)
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{ NewX = M->ManX + 1; NewY = M->ManY; }
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else if (Direction == DIR_UP)
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{ NewX = M->ManX; NewY = M->ManY - 1; }
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else
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{ NewX = M->ManX; NewY = M->ManY + 1; }
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// What's in front of the man?
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if (M->Cells[NewY][NewX] == WALL)
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{
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return 0; // ILLEGAL MOVE
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}
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else if (M->Cells[NewY][NewX] == BOX)
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{
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if (M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)] ==
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BLANK)
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{
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M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)]
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= BOX;
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if (M->Cells[M->ManY][M->ManX] == MANINPLATFORM)
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{ // Man is over Platform
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M->Cells[M->ManY][M->ManX] = PLATFORM;
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M->Cells[NewY][NewX] = MAN;
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}
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else // Man is over Blank
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{
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M->Cells[M->ManY][M->ManX] = BLANK;
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M->Cells[NewY][NewX] = MAN;
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}
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M->ManX = NewX; M->ManY = NewY;
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return 1;
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}
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else
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if (M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)] ==
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PLATFORM)
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{
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M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)]
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= BOXINPLATFORM;
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if (M->Cells[M->ManY][M->ManX] == MANINPLATFORM)
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{ // Man is over Platform
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M->Cells[M->ManY][M->ManX] = PLATFORM;
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M->Cells[NewY][NewX] = MAN;
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}
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else // Man is over Blank
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{
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M->Cells[M->ManY][M->ManX] = BLANK;
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M->Cells[NewY][NewX] = MAN;
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}
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M->ManX = NewX; M->ManY = NewY;
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M->NumBoxesInPlatform++;
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return 1;
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}
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else
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{
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return 0; // ILLEGAL MOVE
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}
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}else
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if (M->Cells[NewY][NewX] == BOXINPLATFORM)
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{
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if (M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)] ==
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BLANK)
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{
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M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)]
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= BOX;
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if (M->Cells[M->ManY][M->ManX] == MANINPLATFORM)
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{ // Man is over Platform
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M->Cells[M->ManY][M->ManX] = PLATFORM;
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M->Cells[NewY][NewX] = MANINPLATFORM;
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}
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else // Man is over Blank
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{
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M->Cells[M->ManY][M->ManX] = BLANK;
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M->Cells[NewY][NewX] = MANINPLATFORM;
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}
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M->ManX = NewX; M->ManY = NewY;
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M->NumBoxesInPlatform--;
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return 1;
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}
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else
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if (M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)] ==
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PLATFORM)
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{
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M->Cells[NewY + (NewY-M->ManY)][NewX + (NewX-M->ManX)]
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= BOXINPLATFORM;
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if (M->Cells[M->ManY][M->ManX] == MANINPLATFORM)
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{ // Man is over Platform
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M->Cells[M->ManY][M->ManX] = PLATFORM;
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M->Cells[NewY][NewX] = MANINPLATFORM;
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}
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else // Man is over Blank
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{
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M->Cells[M->ManY][M->ManX] = BLANK;
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M->Cells[NewY][NewX] = MANINPLATFORM;
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}
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M->ManX = NewX; M->ManY = NewY;
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return 1;
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}
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else
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{
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return 0; // ILLEGAL MOVE
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}
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}
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else if (M->Cells[NewY][NewX] == PLATFORM)
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{
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if (M->Cells[M->ManY][M->ManX] == MANINPLATFORM)
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{ // Man is over Platform
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M->Cells[M->ManY][M->ManX] = PLATFORM;
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M->Cells[NewY][NewX] = MANINPLATFORM;
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}
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else // Man is over Blank
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{
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M->Cells[M->ManY][M->ManX] = BLANK;
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M->Cells[NewY][NewX] = MANINPLATFORM;
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}
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M->ManX = NewX; M->ManY = NewY;
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return 1;
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}
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else if (M->Cells[NewY][NewX] == BLANK) // IF not needed
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{
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if (M->Cells[M->ManY][M->ManX] == MANINPLATFORM)
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{ // Man is over Platform
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M->Cells[M->ManY][M->ManX] = PLATFORM;
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M->Cells[NewY][NewX] = MAN;
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}
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else // Man is over Blank
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{
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M->Cells[M->ManY][M->ManX] = BLANK;
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M->Cells[NewY][NewX] = MAN;
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}
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M->ManX = NewX; M->ManY = NewY;
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return 1;
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}
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return 1;
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}
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int main()
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{
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struct Map Morigin;
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struct Map M[MAX_MOVES+1];
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char Moves[MAX_MOVES];
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int NumMoves;
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int OldMaps;
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int IllegalMove;
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int Carry;
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int i;
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ReadMap(&Morigin, "model");
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ShowMap(&Morigin);
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printf("Numero de moviments inicials a provar: ");
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scanf("%i", &NumMoves);
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IllegalMove = NumMoves - 1;
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for (i = 0; i < NumMoves; i++)
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Moves[i] = DIR_LEFT;
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// Reget the original map
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CopyMap(&M[0], &Morigin);
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CopyMap(&M[NumMoves], &Morigin); // For the first while cond.
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IllegalMove = NumMoves - 1;
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// Process the combination
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for (i = 0; i < NumMoves; i++)
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{
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CopyMap(&M[i+1], &M[i]);
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if (!MoveMan(&M[i+1], Moves[i]))
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{
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IllegalMove = i;
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break;
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}
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}
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// Process the combinations.
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// Order: Left, Right, Up, Down
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while (M[NumMoves].NumPlatforms != M[NumMoves].NumBoxesInPlatform)
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{
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// Increase the Counter
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{
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Carry = 1;
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// Reset the direction of sure-invalid moves
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for (i = IllegalMove + 1; i < NumMoves; i++)
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Moves[i] = DIR_LEFT;
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// Increase Counter for a new try of moves
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for (i = IllegalMove; i >= 0 && Carry; i--)
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{
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Moves[i]++;
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Carry = 0;
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if (Moves[i] == DIR_DOWN + 1)
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{ Moves[i] = DIR_LEFT; Carry = 1; }
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}
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OldMaps = i+1; // Sure? I think it's i+1
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// If we change the number of movements for solution
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if (Carry)
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{
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if (NumMoves > MAX_MOVES)
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break; // MAX MOVES EXCEEDED!!!
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NumMoves++;
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for (i = 0; i < NumMoves; i++)
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Moves[i] = DIR_LEFT;
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OldMaps=0;
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CopyMap(&M[NumMoves], &Morigin);
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// For the first while cond.
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printf("Provant %i moviments...\n", NumMoves);
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}
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}
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/*
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// Print the combination
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for (i=0; i < NumMoves; i++)
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{
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printf("%c", Moves[i]);
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}
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printf("\n");
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*/
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IllegalMove = NumMoves - 1;
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// Process the combination
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for (i = OldMaps; i < NumMoves; i++)
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{
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CopyMap(&M[i+1], &M[i]);
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if (!MoveMan(&M[i+1], Moves[i]))
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{
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IllegalMove = i;
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break;
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}
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}
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}
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// Print the combination
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for (i=0; i < NumMoves; i++)
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{
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printf("%c", Moves[i]);
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}
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printf("\n");
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/*
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// Print The Steps
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strcpy(Moves, "DDDRUU");
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for (i=0; i < 6; i++)
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{
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printf("%i", MoveMan(&M, Moves[i]));
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ShowMap(&M);
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}
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*/
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return 0;
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}
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