static void Main(string[] args)
{
Test1();
Test2();
var contents = File.ReadAllText("input.txt");
var info = TicketInfo.Parse(contents);
int p1 = info.ScanErrorRate();
Console.WriteLine("Part 1 scan error rate = " + p1);
info.DiscardInvalidTickets();
var descs = info.FindTicketDesc();
ulong product = 1;
for (var i = 0; i < descs.Count; i++)
{
if (descs[i].StartsWith("departure"))
{
product *= (ulong)info.MyTicket[i];
}
}
Console.WriteLine("Part 2 product = " + product);
}
static void Test1()
{
var sample = @"class: 1-3 or 5-7
row: 6-11 or 33-44
seat: 13-40 or 45-50
your ticket:
7,1,14
nearby tickets:
7,3,47
40,4,50
55,2,20
38,6,12";
var info = TicketInfo.Parse(sample);
Debug.Assert(info.MyTicket.Count == 3);
Debug.Assert(info.MyTicket[0] == 7);
Debug.Assert(info.MyTicket[2] == 14);
Debug.Assert(info.Rules.Count == 3);
Debug.Assert(info.Rules[0].Name == "class");
Debug.Assert(info.Rules[0].R1Min == 1);
Debug.Assert(info.Others.Count == 4);
Debug.Assert(info.ScanErrorRate() == 71);
info.DiscardInvalidTickets();
Debug.Assert(info.Others.Count == 1);
}
static void Test2()
{
var sample = @"class: 0-1 or 4-19
row: 0-5 or 8-19
seat: 0-13 or 16-19
your ticket:
11,12,13
nearby tickets:
3,9,18
15,1,5
5,14,9";
var info = TicketInfo.Parse(sample);
info.DiscardInvalidTickets();
var descs = info.FindTicketDesc();
Debug.Assert(descs.Count == 3);
Debug.Assert(descs[0] == "row");
Debug.Assert(descs[1] == "class");
Debug.Assert(descs[2] == "seat");
}