private static void FindPath(int row, int col)
{
if (row == AllPaths.goalRowCoordinate && col == AllPaths.goalColCoordinate)
{
AllPaths.validPathsCount++;
return;
}
if (row + 1 < AllPaths.MatrixSize && AllPaths.matrix[row + 1, col])
{
AllPaths.matrix[row + 1, col] = false;
AllPaths.FindPath(row + 1, col);
AllPaths.matrix[row + 1, col] = true;
}
if (col + 1 < AllPaths.MatrixSize && AllPaths.matrix[row, col + 1])
{
AllPaths.matrix[row, col + 1] = false;
AllPaths.FindPath(row, col + 1);
AllPaths.matrix[row, col + 1] = true;
}
if (row - 1 >= 0 && AllPaths.matrix[row - 1, col])
{
AllPaths.matrix[row - 1, col] = false;
AllPaths.FindPath(row - 1, col);
AllPaths.matrix[row - 1, col] = true;
}
if (col - 1 >= 0 && AllPaths.matrix[row, col - 1])
{
AllPaths.matrix[row, col - 1] = false;
AllPaths.FindPath(row, col - 1);
AllPaths.matrix[row, col - 1] = true;
}
}
public static void Main()
{
AllPaths.FindPath(0, 0);
Console.WriteLine(AllPaths.validPathsCount);
}