//Tính Mahattan
private void TinhDoSaiLech(int viTri, ref int[] tongCuaCacViTri)
{
int sum = 0;
int dongDung = -1, cotDung = -1, dongSai = -1, cotSai = -1;
for (int i = 1; i <= PuzzelArray.GetLength(0) * PuzzelArray.GetLength(0) - 1; i++)
{
TimKiemViTriSai(i, ref dongSai, ref cotSai, PuzzelArray);
TimKiemViTriDung(i, ref dongDung, ref cotDung);
sum += Convert.ToInt32(Math.Abs(dongDung - dongSai) + Math.Abs(cotDung - cotSai));
}
tongCuaCacViTri[viTri] = sum;
}
/*private void TinhDoSaiLechGoc(ref int saiLechGoc)
* {
* int sum = 0;
* double dongDung = -1, cotDung = -1, dongSai = -1, cotSai = -1;
* for (int i = 1; i <= PuzzelArray.GetLength(0) * PuzzelArray.GetLength(0) - 1; i++)
* {
* TimKiem(i, ref dongSai, ref cotSai, PuzzelArray);
* TimKiem(i, ref dongDung, ref cotDung, PerfectPuzzel);
* sum += Convert.ToInt32(Math.Abs(dongDung - dongSai) + Math.Abs(cotDung - cotSai));
* }
* saiLechGoc = sum;
* }*/
public void GiaiRoiInKetQua(string path)
{
if (!TimCapNguoc())
{
//g là tầng của cây
int g = 0;
//Tránh trường hợp di chuyển mãi 1 ô
int viTriVuaChon = -1;
while (!DaHoanThanh())
{
viTriSoKhong = new int[2];
//Kiem So 0
bool chuaKiemThaySoKhong = true;
for (int i = 0; i < kichThuoc && chuaKiemThaySoKhong; i++)
{
for (int j = 0; j < kichThuoc; j++)
{
if (PuzzelArray[i, j] == 0)
{
viTriSoKhong[0] = i;
viTriSoKhong[1] = j;
chuaKiemThaySoKhong = false;
break;
}
}
}
int[,] viTriXungQuanh = new int[4, 2];
//Theo thu tu la
/*
* Tren dong|cot
* Duoi dong|cot
* Trai dong|cot
* Phai dong|cot
*/
for (int i = 0; i < viTriXungQuanh.GetLength(0); i++)
{
for (int j = 0; j < viTriXungQuanh.GetLength(1); j++)
{
viTriXungQuanh[i, j] = -1;
}
}
//Trên
int check = viTriSoKhong[0] - 1;
if (check >= 0)
{
viTriXungQuanh[0, 0] = viTriSoKhong[0] - 1;
viTriXungQuanh[0, 1] = viTriSoKhong[1];
}
//Dưới
check = viTriSoKhong[0] + 1;
if (check <= PuzzelArray.GetLength(0) - 1)
{
viTriXungQuanh[1, 0] = viTriSoKhong[0] + 1;
viTriXungQuanh[1, 1] = viTriSoKhong[1];
}
//Trái
check = viTriSoKhong[1] - 1;
if (check >= 0)
{
viTriXungQuanh[2, 0] = viTriSoKhong[0];
viTriXungQuanh[2, 1] = viTriSoKhong[1] - 1;
}
//Phải
check = viTriSoKhong[1] + 1;
if (check <= PuzzelArray.GetLength(1) - 1)
{
viTriXungQuanh[3, 0] = viTriSoKhong[0];
viTriXungQuanh[3, 1] = viTriSoKhong[1] + 1;
}
//Giai thuat Heuristic dung thuat toan Manhattan
int[] tongCuaCacViTri = { -1, -1, -1, -1 }; // Lan luot la Tren Duoi Trai Phai
//Gia Dinh Tren Duoi Trai Phai
// Ben tren thi chuyen xuong roi tinh doSaiLechCuaMoiSo roi tinh tong cua mang doSaiLechCuaMoiSo roi gan vao tongCuaCacViTri[0] va tuong tu
// Tim do sai lech cua ma tran
//int saiLech = 0;
//TinhDoSaiLechGoc(ref saiLech);
//Sau do tinh do sai lech khi di chuyen cac mieng ghep xung quanh
if (!(viTriXungQuanh[0, 0] == -1 && viTriXungQuanh[0, 1] == -1))
{
//Chuyen ben tren xuong
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[0, 0], viTriXungQuanh[0, 1]];
PuzzelArray[viTriXungQuanh[0, 0], viTriXungQuanh[0, 1]] = 0;
//Tinh do sai lech cua TH nay
TinhDoSaiLech(0, ref tongCuaCacViTri);
//Gan lai TH cu
PuzzelArray[viTriXungQuanh[0, 0], viTriXungQuanh[0, 1]] = PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]];
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = 0;
}
if (!(viTriXungQuanh[1, 0] == -1 && viTriXungQuanh[1, 1] == -1))
{
//Chuyen ben duoi len
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[1, 0], viTriXungQuanh[1, 1]];
PuzzelArray[viTriXungQuanh[1, 0], viTriXungQuanh[1, 1]] = 0;
//Tinh do sai lech cua TH nay
TinhDoSaiLech(1, ref tongCuaCacViTri);
//Gan lai TH cu
PuzzelArray[viTriXungQuanh[1, 0], viTriXungQuanh[1, 1]] = PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]];
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = 0;
}
if (!(viTriXungQuanh[2, 0] == -1 && viTriXungQuanh[2, 1] == -1))
{
//Chuyen ben trai qua
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[2, 0], viTriXungQuanh[2, 1]];
PuzzelArray[viTriXungQuanh[2, 0], viTriXungQuanh[2, 1]] = 0;
//Tinh do sai lech cua TH nay
TinhDoSaiLech(2, ref tongCuaCacViTri);
//Gan lai TH cu
PuzzelArray[viTriXungQuanh[2, 0], viTriXungQuanh[2, 1]] = PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]];
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = 0;
}
if (!(viTriXungQuanh[3, 0] == -1 && viTriXungQuanh[3, 1] == -1))
{
//Chuyen ben phai qua
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[3, 0], viTriXungQuanh[3, 1]];
PuzzelArray[viTriXungQuanh[3, 0], viTriXungQuanh[3, 1]] = 0;
//Tinh do sai lech cua TH nay
TinhDoSaiLech(3, ref tongCuaCacViTri);
//Gan lai TH cu
PuzzelArray[viTriXungQuanh[3, 0], viTriXungQuanh[3, 1]] = PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]];
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = 0;
}
//Tong cua cac vi tri cong voi so tang g
for (int i = 0; i < tongCuaCacViTri.Length; i++)
{
if (tongCuaCacViTri[i] != -1)
{
tongCuaCacViTri[i] += g;
}
}
int min = int.MaxValue;
int viTriMin = -1;
for (int i = 0; i < tongCuaCacViTri.Length; i++)
{
if (tongCuaCacViTri[i] <= min && tongCuaCacViTri[i] != -1 && viTriVuaChon != i)
{
min = tongCuaCacViTri[i];
viTriMin = i;
}
}
switch (viTriMin)
{
case 0:
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[0, 0], viTriXungQuanh[0, 1]];
PuzzelArray[viTriXungQuanh[0, 0], viTriXungQuanh[0, 1]] = 0;
Down(PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]]);
viTriVuaChon = 1;
break;
case 1:
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[1, 0], viTriXungQuanh[1, 1]];
PuzzelArray[viTriXungQuanh[1, 0], viTriXungQuanh[1, 1]] = 0;
Up(PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]]);
viTriVuaChon = 0;
break;
case 2:
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[2, 0], viTriXungQuanh[2, 1]];
PuzzelArray[viTriXungQuanh[2, 0], viTriXungQuanh[2, 1]] = 0;
Right(PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]]);
viTriVuaChon = 3;
break;
case 3:
PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]] = PuzzelArray[viTriXungQuanh[3, 0], viTriXungQuanh[3, 1]];
PuzzelArray[viTriXungQuanh[3, 0], viTriXungQuanh[3, 1]] = 0;
Left(PuzzelArray[viTriSoKhong[0], viTriSoKhong[1]]);
viTriVuaChon = 2;
break;
default:
break;
}
//Tang len so tang
g++;
}
StreamWriter sw = new StreamWriter(path);
sw.WriteLine("So buoc can de ra ket qua : {0} ", ketQua.Count);
foreach (var item in ketQua)
{
sw.WriteLine(item);
}
sw.Close();
}
else
{
StreamWriter sw = new StreamWriter(path);
sw.WriteLine("Khong co loi giai");
sw.Close();
}
}
/*
* private bool TimCapNguoc(int kichThuoc)
* {
* if (kichThuoc % 2 == 0)
* {
* int viTriSoKhong = -1;
* int soCapNguoc = 0;
* for (int i = 0; i < PuzzelArray.GetLength(0); i++)
* {
* for (int j = 0; j < PuzzelArray.GetLength(1); j++)
* {
* if (j == PuzzelArray.GetLength(1) - 1)
* {
* for (int k = i + 1; k < PuzzelArray.GetLength(0); k++)
* {
* for (int l = 0; l < PuzzelArray.GetLength(1); l++)
* {
* if (PuzzelArray[i, j] > PuzzelArray[k, l] && PuzzelArray[i, j] != 0 && PuzzelArray[k, l] != 0)
* {
* soCapNguoc++;
* }
* else if (PuzzelArray[i, j] == 0)
* {
* viTriSoKhong = i;
* }
* else if (PuzzelArray[k, l] != 0)
* {
* viTriSoKhong = k;
* }
* }
* }
* }
* else if (i == PuzzelArray.GetLength(0) && j == PuzzelArray.GetLength(1))
* {
* break;
* }
* else
* {
* for (int k = i; k < PuzzelArray.GetLength(0); k++)
* {
* for (int l = j++; l < PuzzelArray.GetLength(1); l++)
* {
* if (PuzzelArray[i, j] > PuzzelArray[k, l] && PuzzelArray[i, j] != 0 && PuzzelArray[k, l] != 0)
* {
* soCapNguoc++;
* }
* else if (PuzzelArray[i, j] == 0)
* {
* viTriSoKhong = i;
* }
* else if (PuzzelArray[k, l] != 0)
* {
* viTriSoKhong = k;
* }
* }
* }
* }
* }
* }
* if (soCapNguoc % 2 + viTriSoKhong == 0)
* {
* return false;
* }
* else
* {
* return true;
* }
* }
* else
* {
* int soCapNguoc = 0;
* for (int i = 0; i < PuzzelArray.GetLength(0); i++)
* {
* for (int j = 0; j < PuzzelArray.GetLength(1); j++)
* {
* if (j == PuzzelArray.GetLength(1) - 1)
* {
* for (int k = i + 1; k < PuzzelArray.GetLength(0); k++)
* {
* for (int l = 0; l < PuzzelArray.GetLength(1); l++)
* {
* if (PuzzelArray[i, j] > PuzzelArray[k, l] && PuzzelArray[i, j] != 0 && PuzzelArray[k, l] != 0)
* {
* soCapNguoc++;
* }
* }
* }
* }
* else if (i == PuzzelArray.GetLength(0) && j == PuzzelArray.GetLength(1))
* {
* break;
* }
* else
* {
* for (int k = i; k < PuzzelArray.GetLength(0); k++)
* {
* for (int l = j++; l < PuzzelArray.GetLength(1); l++)
* {
* if (PuzzelArray[i, j] > PuzzelArray[k, l] && PuzzelArray[i, j] != 0 && PuzzelArray[k, l] != 0)
* {
* soCapNguoc++;
* }
*
* }
* }
* }
* }
* }
* if (soCapNguoc % 2 == 0)
* {
* return true;
* }
* else
* {
* return false;
* }
* }
* }
*/
private bool TimCapNguoc()
{
int[] mang1Chieu = new int[kichThuoc * kichThuoc - 1];
int k = 0;
for (int i = 0; i < PuzzelArray.GetLength(0); i++)
{
for (int j = 0; j < PuzzelArray.GetLength(1); j++)
{
if (PuzzelArray[i, j] != 0)
{
mang1Chieu[k] = PuzzelArray[i, j];
k++;
}
}
}
int soCapNguoc = 0;
if (kichThuoc % 2 == 0)
{
bool chuaKiemThaySoKhong = true;
int viTri = -1;
for (int i = 0; i < kichThuoc && chuaKiemThaySoKhong; i++)
{
for (int j = 0; j < kichThuoc; j++)
{
if (PuzzelArray[i, j] == 0)
{
viTri = i;
chuaKiemThaySoKhong = false;
break;
}
}
}
for (int i = 0; i < mang1Chieu.Length - 1; i++)
{
for (int j = i + 1; j < mang1Chieu.Length; j++)
{
if (mang1Chieu[i] > mang1Chieu[j])
{
soCapNguoc++;
}
}
}
if ((soCapNguoc + viTri) % 2 == 0)
{
return(true);
//Khong giai duoc
}
else
{
return(false);
//Giai duoc
}
}
else
{
for (int i = 0; i < mang1Chieu.Length - 1; i++)
{
for (int j = i + 1; j < mang1Chieu.Length; j++)
{
if (mang1Chieu[i] > mang1Chieu[j])
{
soCapNguoc++;
}
}
}
if (soCapNguoc % 2 == 0)
{
return(false);
//Giai duoc
}
else
{
return(true);
//Khong giai duoc
}
}
}
