private string SolveB()
{
var eris = new MultiEris();
var lines = File.ReadAllLines(Input, Encoding.UTF8);
for (var y = 0; y < 5; y++)
{
for (var x = 0; x < 5; x++)
{
if (lines[y][x] == '#')
{
var index = new MultiEris.Index {
X = x, Y = y, Depth = 0
};
eris.SetContent(index, true);
}
}
}
var next = eris;
for (int i = 0; i < 200; i++)
{
next = next.Iterate();
}
return(next.BugCount.ToString());
}
public MultiEris Iterate()
{
var bugs = IndicesWithBugs();
// do all the neighbors of all the bugs, and also the bugs.
var toEvaluate = new List <MultiEris.Index>(bugs);
foreach (var b in bugs)
{
toEvaluate.AddRange(Neighbors(b));
}
var unique = toEvaluate.Distinct();
var next = new MultiEris();
foreach (var u in unique)
{
var neighbors = Neighbors(u);
var neighborBugCount = neighbors.Sum(n => GetContent(n) ? 1 : 0);
bool hasBug = GetContent(u);
bool isBug = hasBug ? (neighborBugCount == 1) : (neighborBugCount == 1 || neighborBugCount == 2);
if (isBug)
{
next.SetContent(u, true);
}
}
return(next);
}
public bool ProveB()
{
var index1 = new MultiEris.Index {
Depth = 0, X = 3, Y = 3
};
var neighbors1 = MultiEris.Neighbors(index1);
if (neighbors1.Length != 4)
{
return(false);
}
var index2 = new MultiEris.Index {
Depth = 1, X = 3, Y = 0
};
var neighbors2 = MultiEris.Neighbors(index2);
if (neighbors2.Length != 4)
{
return(false);
}
var index3 = new MultiEris.Index {
Depth = 1, X = 4, Y = 0
};
var neighbors3 = MultiEris.Neighbors(index3);
if (neighbors3.Length != 4)
{
return(false);
}
var index4 = new MultiEris.Index {
Depth = 1, X = 3, Y = 2
};
var neighbors4 = MultiEris.Neighbors(index4);
if (neighbors4.Length != 8)
{
return(false);
}
var eris = new MultiEris();
var lines = File.ReadAllLines(Example, Encoding.UTF8);
for (var y = 0; y < 5; y++)
{
for (var x = 0; x < 5; x++)
{
if (lines[y][x] == '#')
{
var index = new MultiEris.Index {
X = x, Y = y, Depth = 0
};
eris.SetContent(index, true);
}
}
}
if (eris.BugCount != 8)
{
return(false);
}
// Iterate 10 times
var next = eris;
for (int i = 0; i < 10; i++)
{
next = next.Iterate();
}
if (next.BugCount != 99)
{
return(false);
}
return(true);
}
