protected override long ComputeResultLogic(Day16Model input)
{
var invalidTicketsAndSumOfInvalidValues = Day16Helper.GetInvalidTicketsAndSumOfInvalidValues(input);
var validTickets = input.NeighborTickets.Where(t => !invalidTicketsAndSumOfInvalidValues.Item1.Contains(t));
var fieldsPerIndex = new Dictionary <int, IEnumerable <string> >();
var fieldsOrder = new string[input.FieldDefinitions.Count()];
for (var index = 0; index < input.FieldDefinitions.Count(); index++)
{
var fieldValuesAtCurrentIndex = new List <int>();
foreach (var ticket in validTickets)
{
fieldValuesAtCurrentIndex.Add(ticket.TicketValues.ElementAt(index));
}
var validFieldsForIndex = Day16Helper.GetValidFieldsByAllValidValues(fieldValuesAtCurrentIndex, input.FieldDefinitions);
fieldsPerIndex.Add(index, validFieldsForIndex);
}
var currentIndex = 0;
while (fieldsOrder.Contains(null))
{
if (fieldsPerIndex[currentIndex].Count() == 1)
{
fieldsOrder[currentIndex] = fieldsPerIndex[currentIndex].First();
Day16Helper.RemoveDuplicates(fieldsOrder[currentIndex], currentIndex, fieldsOrder.Length, fieldsPerIndex);
}
if (currentIndex == fieldsOrder.Length - 1)
{
currentIndex = 0;
}
else
{
currentIndex++;
}
}
long fieldValuesMultiplied = 1;
var myTicketValues = input.MyTicket.TicketValues.ToArray();
for (var fieldOrderIndex = 0; fieldOrderIndex < fieldsOrder.Length; fieldOrderIndex++)
{
if (fieldsOrder[fieldOrderIndex].StartsWith("departure"))
{
fieldValuesMultiplied *= myTicketValues[fieldOrderIndex];
}
}
return(fieldValuesMultiplied);
}
protected override int ComputeResultLogic(Day16Model input)
{
var invalidTicketsAndSumOfInvalidValues = Day16Helper.GetInvalidTicketsAndSumOfInvalidValues(input);
return(invalidTicketsAndSumOfInvalidValues.Item2);
}