public void Part1()
{
var answer = Day18.Part1();
answer.Should().NotBe(-1);
answer.Should().BeLessThan(5620);
answer.Should().BeLessThan(5619);
answer.Should().Be(3884L);
}
public void Part1_Example()
{
var answer = Day18.Part1(true);
answer.Should().Be(4140);
}
