public int TimeToRotOranges(int[,] mat)
{
#region add rotten in Queue and Delimeter
for (int i = 0; i < ROW; i++)
{
for (int j = 0; j < COL; j++)
{
if (mat[i, j] == 2)
{
q.Enqueue(new Coordinate(i, j));
}
}
}
q.Enqueue(new Coordinate(-1, -1));
#endregion
var flag = false;
while (q.Count() != 0)
{
while (!IfPeekDelimiter(q.Peek()))
{
Coordinate element = q.Dequeue();
if (IsFreshOrange(mat, element.X - 1, element.Y))
{
mat[element.X - 1, element.Y] = 2;
q.Enqueue(new Coordinate(element.X - 1, element.Y));
if (!flag)
{
flag = true;
_count++;
}
}
if (IsFreshOrange(mat, element.X, element.Y + 1))
{
mat[element.X, element.Y + 1] = 2;
q.Enqueue(new Coordinate(element.X, element.Y + 1));
if (!flag)
{
flag = true;
_count++;
}
}
if (IsFreshOrange(mat, element.X + 1, element.Y))
{
mat[element.X + 1, element.Y] = 2;
q.Enqueue(new Coordinate(element.X + 1, element.Y));
if (!flag)
{
flag = true;
_count++;
}
}
if (IsFreshOrange(mat, element.X, element.Y - 1))
{
mat[element.X, element.Y - 1] = 2;
q.Enqueue(new Coordinate(element.X, element.Y - 1));
if (!flag)
{
flag = true;
_count++;
}
}
}
q.Dequeue();
flag = false;
if (q.Count() != 0)
{
q.Enqueue(new Coordinate(-1, -1));
}
}
return(IfAnyFreshOrangesLeft(mat) ? -1 : _count);
}
public bool IfPeekDelimiter(Coordinate c)
{
return(c.X == -1 && c.Y == -1);
}