//< Part 1
public static long TobogganRun(TobogganTrajectory slope)
{
string[] obstacles = ImportData();
long treeCount = 0;
int xCounter = 0;
for (int i = 0; i < obstacles.Length; i += slope.Y)
{
int xCord = xCounter * slope.X;
string xPlane = obstacles[i];
char[] xPoints = xPlane.ToCharArray();
if (xPoints[xCord % xPlane.Length] == '#')
{
treeCount++;
}
xCounter++;
}
//Console.WriteLine($"\nSlope: {slope.Rise}/{slope.Run} /// Tree impacts: {treeCount} /// Line count:{xCounter}\n");
return(treeCount);
}
//< Part 2
public static long GetSlopeProducts()
{
int[] rise = { 1, 1, 1, 1, 2 };
int[] run = { 1, 3, 5, 7, 1 };
List <TobogganTrajectory> slopeList = new List <TobogganTrajectory>();
for (int i = 0; i < rise.Length; i++)
{
TobogganTrajectory slope = new TobogganTrajectory(rise[i], run[i]);
slopeList.Add(slope);
}
var treeCounts = slopeList.Select(slope => TobogganRun(slope)).ToList();
long treeCountProduct = treeCounts.Aggregate((total, next) => total * next);
Console.WriteLine(treeCountProduct);
return(treeCountProduct);
}
