private int Solve(string input)
{
var day10Part2 = new Day10Part2();
var lines = new List <string>();
for (var i = 0; i < 128; i++)
{
var hash = day10Part2.CreateKnotHash(input + "-" + i);
var stringBuilder = new StringBuilder();
foreach (var c in hash)
{
var tmp = Convert.ToString(Convert.ToInt32(c.ToString(), 16), 2);
stringBuilder.Append(string.Format("{0:X4}", tmp).PadLeft(4, '0'));
}
lines.Add(stringBuilder.ToString());
}
var ints = new int[128, 128];
for (var i = 0; i < lines.Count; i++)
{
var line = lines[i];
for (var j = 0; j < line.Length; j++)
{
var c = line[j];
if (c == '0')
{
ints[i, j] = 0;
}
}
}
return(lines.SelectMany(x => x).Count(x => x == '1'));
}
private int Solve(string input)
{
var day10Part2 = new Day10Part2();
var lines = new List <string>();
for (var i = 0; i < 128; i++)
{
var hash = day10Part2.CreateKnotHash(input + "-" + i);
var stringBuilder = new StringBuilder();
foreach (var c in hash)
{
var tmp = Convert.ToString(Convert.ToInt32(c.ToString(), 16), 2);
stringBuilder.Append(string.Format("{0:X4}", tmp).PadLeft(4, '0'));
}
lines.Add(stringBuilder.ToString());
}
var groups = new int[128, 128];
var groupNr = 1;
for (var i = 0; i < lines.Count; i++)
{
for (var j = 0; j < lines[i].Length; j++)
{
if (Mark(i, j, groupNr, groups, lines))
{
groupNr++;
}
}
}
return(groupNr - 1);
}