/// <summary>
/// https://adventofcode.com/2020/day/3
/// </summary>
public static void Part1()
{
var map = TobogganMap.Parse(Input.Get(3));
var path = map.GetPath(3, 1);
var trees = path.Count(x => x == TobogganMapTile.Tree);
Console.WriteLine(trees);
}
/// <summary>
/// https://adventofcode.com/2020/day/3#part2
/// </summary>
public static void Part2()
{
var map = TobogganMap.Parse(Input.Get(3));
BigInteger product = 1;
foreach (var(dx, dy) in new[] { (1, 1), (3, 1), (5, 1), (7, 1), (1, 2) })