private static int CountV(int x, Eris eris)
{
var c = 0;
for (int i = 0; i < N; i++)
{
if (eris.Get(x, i))
{
c++;
}
}
return(c);
}
private static int CountH(int y, Eris eris)
{
var c = 0;
for (int i = 0; i < N; i++)
{
if (eris.Get(i, y))
{
c++;
}
}
return(c);
}
public bool ProveA()
{
var eris = new Eris();
var lines = File.ReadAllLines(Example, Encoding.UTF8);
for (var y = 0; y < 5; y++)
{
for (var x = 0; x < 5; x++)
{
eris.SetBug(x, y, lines[y][x] == '#');
}
}
return(SimpleSolution(eris, false) == 2129920);
}
private string SolveA()
{
var eris = new Eris();
var lines = File.ReadAllLines(Input, Encoding.UTF8);
for (var y = 0; y < 5; y++)
{
for (var x = 0; x < 5; x++)
{
eris.SetBug(x, y, lines[y][x] == '#');
}
}
return(SimpleSolution(eris, false).ToString());
}
public Eris Iterate()
{
var next = new Eris();
for (var y = 0; y < 5; y++)
{
for (var x = 0; x < 5; x++)
{
int neighbors = NeighboringBugs(x, y);
bool hasBug = GetBug(x, y);
bool isBug = hasBug ? (neighbors == 1) : (neighbors == 1 || neighbors == 2);
next.SetBug(x, y, isBug);
}
}
return(next);
}
public override string Part1()
{
var eris = new Eris(ReadAllText(), false, 0);
var set = new DefaultDict <int, int>();
while (true)
{
var r = eris.Rating();
set[r]++;
if (set[r] > 1)
{
return(r.ToString());
}
eris.Tick();
eris.Swap();
}
}
public override string Part2()
{
foreach (var i in Enumerable.Range(-100, 201))
{
Planet[i] = new Eris(i == 0 ? ReadAllText() : string.Empty, true, i);
}
foreach (var n in Enumerable.Range(0, 200))
{
foreach (var e in Planet.Values)
{
e.Tick();
}
foreach (var e in Planet.Values)
{
e.Swap();
}
}
return(Planet.Values.Sum(x => x.CountBugs()).ToString());
}
private long SimpleSolution(Eris eris, bool trace)
{
var patterns = new HashSet <long>();
var next = eris;
while (true)
{
var hash = next.Hash();
if (patterns.Contains(hash))
{
return(hash);
}
patterns.Add(hash);
next = next.Iterate();
if (trace)
{
next.Trace();
}
}
}
