public long BrutePart1()
{
_lastOutput = 0;
for (int i = 4; i < 15; i++)
{
var bruteforce = Ext.GetCombinations(GenerateCode().ToList(), i);
Parallel.ForEach(bruteforce, (_input, _state) =>
{
var input = _input.ToList();
foreach (var code2 in input.GetPermutations(input.Count))
{
if (RunSprintBot(code2, "WALK"))
{
code2.ToList().ForEach(Console.WriteLine);
_state.Stop();
}
}
});
if (_lastOutput > 10)
{
return(_lastOutput);
}
}
throw new InvalidProgramException();
}
public override string Part1()
{
var moons = GetMoons().ToList();
var pairs = Ext.GetCombinations(moons, 2).Select(x => (x.First(), x.Last())).ToList();
var steps = 1000;
while (steps-- > 0)
{
Step(moons, pairs);
}
return(moons.Select(x => x.Energy).Sum().ToString());
}
public override string Part2()
{
var init = GetMoons().ToList();
var moons = GetMoons().ToList();
var pairs = Ext.GetCombinations(moons, 2).Select(x => (x.First(), x.Last())).ToList();
var cycles = new ulong[3];
ulong steps = 0;
while (true)
{
steps++;
Step(moons, pairs);
for (var j = 0; j < 3; j++)
{
var ok = true;
foreach (var i in Enumerable.Range(0, moons.Count))
{
if (!(moons[i].Pos[j] == init[i].Pos[j] && moons[i].Vel[j] == 0 && cycles[j] == 0))
{
ok = false;
break;
}
}
if (ok)
{
cycles[j] = steps;
}
}
if (cycles.All(x => x != 0))
{
return(Ext.NWW(cycles[0], Ext.NWW(cycles[1], cycles[2])).ToString());
}
}
}