private static long Solve(Position startPosition)
{
var queue = new Queue<Position>();
queue.Enqueue(startPosition);
while (queue.Count != 0)
{
var currentPosition = queue.Dequeue();
available[currentPosition.Row, currentPosition.Col] = false;
foreach (var nextMovePosition in availableHorseMoves)
{
var nextPosition = currentPosition + nextMovePosition;
nextPosition.NumberOfMoves = currentPosition.NumberOfMoves + 1;
if (IsPossiblePosition(nextPosition))
{
if (nextPosition.Row == endPosition.Row && nextPosition.Col == endPosition.Col)
{
return nextPosition.NumberOfMoves;
}
if (available[nextPosition.Row, nextPosition.Col])
{
queue.Enqueue(nextPosition);
available[nextPosition.Row, nextPosition.Col] = false;
}
}
}
}
return -1;
}
private static void ReadInput()
{
int n = int.Parse(Console.ReadLine());
available = new bool[n, n];
for (int i = 0; i < n; i++)
{
var lineAsCharArray = Console.ReadLine().Split(' ');
for (int j = 0; j < lineAsCharArray.Length; j++)
{
if (lineAsCharArray[j] == "s")
{
startPosition = new Position() { Row = i, Col = j, NumberOfMoves = 0L };
}
else if (lineAsCharArray[j] == "e")
{
endPosition = new Position() { Row = i, Col = j };
available[i, j] = true;
}
else if (lineAsCharArray[j] == "-")
{
available[i, j] = true;
}
}
}
}
private static bool IsPossiblePosition(Position position)
{
return position.Row >= 0 && position.Col >= 0 && position.Row < available.GetLength(0) && position.Col < available.GetLength(1);
}