public static string B(string input)
{
List <string> inputList = input.Split(new string[] { Environment.NewLine }, StringSplitOptions.None).ToList();
IntVector2 position = new IntVector2(0, 0);
IntVector2 waypoint = new IntVector2(10, -1);
foreach (string line in inputList)
{
char direction = line[0];
int magnitude = Convert.ToInt32(line.Substring(1));
switch (direction)
{
case 'N':
waypoint = waypoint.North(magnitude);
break;
case 'E':
waypoint = waypoint.East(magnitude);
break;
case 'S':
waypoint = waypoint.South(magnitude);
break;
case 'W':
waypoint = waypoint.West(magnitude);
break;
case 'F':
position = position.Add(waypoint.Multiply(magnitude));
break;
case 'L':
while (magnitude > 0)
{
waypoint = waypoint.Left();
magnitude -= 90;
}
break;
case 'R':
while (magnitude > 0)
{
waypoint = waypoint.Right();
magnitude -= 90;
}
break;
default:
throw new Exception("Invalid direction: " + direction);
}
//Console.WriteLine("Position: " + position + ", Direction: " + facing);
}
return(position.Distance(new IntVector2(0, 0)).ToString());;
}
public static string B(string input)
{
seaMonster.Add(new IntVector2(18, 0));
seaMonster.Add(new IntVector2(0, 1));
seaMonster.Add(new IntVector2(5, 1));
seaMonster.Add(new IntVector2(6, 1));
seaMonster.Add(new IntVector2(11, 1));
seaMonster.Add(new IntVector2(12, 1));
seaMonster.Add(new IntVector2(17, 1));
seaMonster.Add(new IntVector2(18, 1));
seaMonster.Add(new IntVector2(19, 1));
seaMonster.Add(new IntVector2(1, 2));
seaMonster.Add(new IntVector2(4, 2));
seaMonster.Add(new IntVector2(7, 2));
seaMonster.Add(new IntVector2(10, 2));
seaMonster.Add(new IntVector2(13, 2));
seaMonster.Add(new IntVector2(16, 2));
ProcessInput(input);
LockSectors();
// find the corners
// first, find the north west corner
IntVector2 currentPos = new IntVector2(0, 0);
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.North();
}
currentPos = currentPos.South();
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.West();
}
currentPos = currentPos.East();
int minX = currentPos.X;
int minY = currentPos.Y;
// Find the south east corner;
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.South();
}
currentPos = currentPos.North();
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.East();
}
currentPos = currentPos.West();
int maxX = currentPos.X;
int maxY = currentPos.Y;
// Make the map
char[,] map = new char[(maxX - minX + 1) * 8, (maxY - minY + 1) * 8];
for (int outerX = minX; outerX <= maxX; outerX++)
{
for (int outerY = minY; outerY <= maxY; outerY++)
{
char[,] contents = lockedSectors[new IntVector2(outerX, outerY)].Contents;
for (int x = 0; x < 8; x++)
{
for (int y = 0; y < 8; y++)
{
map[(outerX - minX) * 8 + x, (outerY - minY) * 8 + y] = contents[x + 1, y + 1];
}
}
}
}
// Map made. Now we need to find sea monsters
int size = map.GetLength(0);
int seaMonsterCount = 0;
for (int i = 0; i < 8; i++)
{
seaMonsterCount = CountSeaMonsters(map);
if (seaMonsterCount > 0)
{
break;
}
// (x,y) -> (height-y, x)
char[,] newMap = new char[size, size];
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size; y++)
{
newMap[x, y] = map[size - y - 1, x];
}
}
map = newMap;
if (i == 4)
{
newMap = new char[size, size];
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size; y++)
{
newMap[x, y] = map[y, x];
}
}
map = newMap;
}
}
// Sea monsters are 15 squares
// count the number of waves
int waveCount = 0;
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size; y++)
{
if (map[x, y] == '#')
{
waveCount++;
}
}
}
return((waveCount - 15 * seaMonsterCount).ToString());
}
public static string A(string input)
{
ProcessInput(input);
LockSectors();
//DrawSectors();
/*
* for (int y = -5; y <= 5; y++)
* {
* for (int x = -5; x <= 5; x++)
* {
* if (lockedSectors.ContainsKey(new IntVector2(x, y)))
* {
* Console.Write("X");
* }
* else
* {
* Console.Write(".");
* }
* }
* Console.WriteLine();
* }
*/
// find the corners
// first, find the north west corner
long answer = 1;
IntVector2 currentPos = new IntVector2(0, 0);
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.North();
}
currentPos = currentPos.South();
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.West();
}
currentPos = currentPos.East();
answer = answer * lockedSectors[currentPos].Id;
// move to the north east corner
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.East();
}
currentPos = currentPos.West();
answer = answer * lockedSectors[currentPos].Id;
// move to the south east corner
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.South();
}
currentPos = currentPos.North();
answer = answer * lockedSectors[currentPos].Id;
// move to the south west corner
while (lockedSectors.ContainsKey(currentPos))
{
currentPos = currentPos.West();
}
currentPos = currentPos.East();
answer = answer * lockedSectors[currentPos].Id;
return(answer.ToString());
}