public AvgPathMove(int[,] p, string move, AvgPathMove parent)
{
if (parent == null) level = 0;
else level = parent.level + 1;
this.parent = parent;
this.p = p;
this.move = move;
pos = GenPos();
score = GetScore(p);
}
public static string[] Solve(int[,] initial, ref int countStep, int maxStep, long durationPerClickMs, long timeLimitMs)
{
#if TRIAL
maxStep = 25;
#endif
InitializeDatabase();
int[] count = new int[maxStep + 1];
AvgPathMove bestAnswer = null;
BinaryHeap[] nextQueue = new BinaryHeap[6];
for (int color = 1; color < 6; color++)
nextQueue[color] = new BinaryHeap();
Hashtable used = new Hashtable();
for (int color = 1; color < 6; color++)
{
int[,] initialColor = new int[9, 9];
for (int i = 0; i < 9; i++)
for (int j = 0; j < 9; j++)
initialColor[i, j] = (initial[i, j] == color) ? 1 : 0;
AvgPathMove firstMove = new AvgPathMove(initialColor, null, null);
nextQueue[color].Insert(firstMove.score, firstMove);
used[firstMove.pos] = true;
if (FoundSolution(firstMove, maxStep))
{
bestAnswer = firstMove;
break;
}
}
long startTime = System.DateTime.Now.Ticks;
while (bestAnswer == null)
{
if (((System.DateTime.Now.Ticks - startTime) / TimeSpan.TicksPerMillisecond) > timeLimitMs)
return null;
bool isBreak = true;
for (int color = 1; color < 6; color++)
if (nextQueue[color].Count > 0) isBreak = false;
if (isBreak == true) break;
countStep++;
bool end = false;
for (int color = 1; color < 6; color++)
{
AvgPathMove m = (AvgPathMove)(nextQueue[color].Remove());
AvgPathMove[] newMoves = new AvgPathMove[] {
m.next(0,'U'),m.next(1,'U'), m.next(2,'U'),
m.next(0,'D'),m.next(1,'D'), m.next(2,'D'),
m.next(0,'R'),m.next(1,'R'), m.next(2,'R'),
m.next(0,'L'),m.next(1,'L'), m.next(2,'L')
};
for (int i = 0; i < newMoves.Length; i++)
{
if (used[newMoves[i].pos] != null) continue;
if (FoundSolution(newMoves[i], maxStep))
{
bestAnswer = newMoves[i];
end = true;
break;
}
#if TRIAL
if (newMoves[i].level >= 19) continue;
#else
if (newMoves[i].level >= (maxStep - 6)) continue;
#endif
count[newMoves[i].level]++;
used[newMoves[i].pos] = true;
nextQueue[color].Insert(newMoves[i].score, newMoves[i]);
}
if (end == true) break;
}
if (end == true) break;
}
if (bestAnswer == null) return null;
//refAnswer = bestAnswer;
string[] steps = new string[bestAnswer.level];
AvgPathMove b = bestAnswer;
for (int i = steps.Length - 1; i >= 0; i--)
{
steps[i] = b.move;
b = b.parent;
}
string[] contSteps = GetSolution(bestAnswer);
string[] final = new string[steps.Length + contSteps.Length];
for (int i = 0; i < steps.Length; i++)
final[i] = steps[i];
for (int i = 0; i < contSteps.Length; i++)
final[i + steps.Length] = contSteps[i];
conn.Close();
return final;
}
private static bool FoundSolution(AvgPathMove bestPathMove, int maxStep)
{
DbCommand cmd = conn.CreateCommand();
#if TRIAL
cmd.CommandText = "SELECT COUNT(1) FROM block_colors WHERE pos='" + bestPathMove.pos + "' AND num_steps = " + (25 - bestPathMove.level);
#else
cmd.CommandText = "SELECT COUNT(1) FROM block_colors WHERE pos='" + bestPathMove.pos + "' AND num_steps <= " + (maxStep - bestPathMove.level);
#endif
long num = (long)cmd.ExecuteScalar();
cmd.Dispose();
if (num > 0) return true;
else return false;
}
private static string[] GetSolution(AvgPathMove bestPathMove)
{
List<string> buffer = new List<string>();
while (true)
{
if (bestPathMove.IsFinish()) break;
DbCommand cmd = conn.CreateCommand();
cmd.CommandText = "SELECT move FROM block_colors WHERE pos='" + bestPathMove.pos + "'";
string move = (string)cmd.ExecuteScalar();
if (move == "") break;
char[] c = move.ToCharArray();
if (c[1] == 'U') c[1] = 'D';
else if (c[1] == 'D') c[1] = 'U';
else if (c[1] == 'L') c[1] = 'R';
else if (c[1] == 'R') c[1] = 'L';
string reverseMove = c[0] + "" + c[1];
buffer.Add(reverseMove);
cmd.Dispose();
bestPathMove = bestPathMove.next(int.Parse(c[0] + ""), c[1]);
}
return buffer.ToArray();
}