public void Day09XmasDecoder_Part1_OK()
{
var numbers = DailyDataUtilities.ReadLongsFromFile("Day09Data.txt");
Assert.Equal(1000, numbers.Count);
var sut = new XmasDecoder(numbers, 25);
long actual = sut.FindFirstFail();
Assert.Equal(69316178, actual);
}
public void Day10AdapterCheck_Part1_and_Part2_OK()
{
var adapters = DailyDataUtilities.ReadLongsFromFile("Day10Data.txt");
Assert.Equal(103, adapters.Count);
adapters.Sort();
adapters.Insert(0, 0);
adapters.Add(adapters[adapters.Count - 1] + 3);
List <long> diffs = new List <long>();
for (int i = 0; i < adapters.Count - 1; i++)
{
diffs.Add(adapters[i + 1] - adapters[i]);
}
var ones = diffs.Where(d => d == 1).Count();
var threes = diffs.Where(d => d == 3).Count();
Assert.Equal(2343, ones * threes);
Dictionary <long, long> combos = new Dictionary <long, long>();
// the first has to exist
combos.Add(0, 1);
for (int idx = 1; idx < adapters.Count; idx++)
{
combos.Add(adapters[idx], 0);
if (combos.ContainsKey(adapters[idx] - 1))
{
combos[adapters[idx]] += combos[adapters[idx] - 1];
}
if (combos.ContainsKey(adapters[idx] - 2))
{
combos[adapters[idx]] += combos[adapters[idx] - 2];
}
if (combos.ContainsKey(adapters[idx] - 3))
{
combos[adapters[idx]] += combos[adapters[idx] - 3];
}
}
Assert.Equal(31581162962944, combos[adapters.Max()]);
}
public void Day10ReadData_OK()
{
var adapters = DailyDataUtilities.ReadLongsFromFile("Day10Data.txt");
Assert.Equal(103, adapters.Count);
}
public void Day09ReadDataFileAsLongs_OK()
{
var numbers = DailyDataUtilities.ReadLongsFromFile("Day09Data.txt");
Assert.Equal(1000, numbers.Count);
}