public SudokuSolver(int[,] initialGrid)
{
m_grid = new int[9, 9];
m_cellConstraintMatrix = new Candidate[9, 9];
m_rowConstraintMatrix = new Candidate[9];
m_colConstraintMatrix = new Candidate[9];
m_regionConstraintMatrix = new Candidate[9, 9];
solved = new HashSet<Cell>();
unsolved = new HashSet<Cell>();
changed = new Stack<HashSet<Cell>>();
bucketList = new HashSet<Cell>[10];
steps = 0;
// initialize constraints
for (int row = 0; row < 9; row++)
{
for (int col = 0; col < 9; col++)
{
// copy grid, and turn on all Candidates for every cell
m_grid[row, col] = initialGrid[row, col];
m_cellConstraintMatrix[row, col] = new Candidate(9, true);
}
}
for (int i = 0; i < 9; i++)
{
m_rowConstraintMatrix[i] = new Candidate(9, false);
m_colConstraintMatrix[i] = new Candidate(9, false);
bucketList[i] = new HashSet<Cell>();
}
bucketList[9] = new HashSet<Cell>();
for (int row = 0; row < 3; row++)
for (int col = 0; col < 3; col++)
m_regionConstraintMatrix[row, col] = new Candidate(9, false);
InitializeMatrices();
PopulateCandidates();
}
public CandidateEnumerator(Candidate c)
{
m_c = c;
m_position = 0;
}