public static void Main()
{
var rows = int.Parse(Console.ReadLine());
var beach = new Beach(rows);
SetMatrix(beach, rows);
var command = Console.ReadLine()
.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
var seashellsCollected = new List <char>();
var seagull = new Seagull();
while (command[0] != "Sunset")
{
var row = int.Parse(command[1]);
var col = int.Parse(command[2]);
if (command[0] == "Collect")
{
if (ValidateCoordinates(beach, row, col))
{
if (char.IsLetter(beach.Matrix[row][col]))
{
seashellsCollected.Add(beach.Matrix[row][col]);
beach.Matrix[row][col] = '-';
}
}
}
else if (command[0] == "Steal")
{
var direction = command[3];
MoveSeagull(beach, row, col, direction, seagull);
}
command = Console.ReadLine()
.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
}
PrintOutput(beach, seashellsCollected, seagull);
}
private static void MoveSeagull(Beach beach, int row, int col, string direction, Seagull seagull)
{
if (ValidateCoordinates(beach, row, col))
{
seagull.Steal(beach, row, col);
for (int i = 1; i <= 3; i++)
{
var destinationRow = row;
var destinationCol = col;
if (direction == "up")
{
destinationRow = row - i;
}
else if (direction == "down")
{
destinationRow = row + i;
}
else if (direction == "left")
{
destinationCol = col - i;
}
else if (direction == "right")
{
destinationCol = col + i;
}
if (ValidateCoordinates(beach, destinationRow, destinationCol))
{
seagull.Steal(beach, destinationRow, destinationCol);
}
else
{
break;
}
}
}
}
private static bool ValidateCoordinates(Beach beach, int row, int col)
{
return(row >= 0 && col >= 0 && row < beach.Matrix.GetLength(0) && col < beach.Matrix[row].Length);
}