protected override int Part2(string[] input)
{
var secret = input[0];
var finder = new Md5HashFinder(Md5HashFinder.Condition6x0);
var iterations = finder.FindMatches(secret, 0).First().Iterations;
return(iterations);
}
protected override string Part1(string[] input)
{
var secret = input[0];
var finder = new Md5HashFinder(Md5HashFinder.Condition5x0);
var result = finder.FindMatches(secret, 0)
.Take(8)
.Select(x => x.Hash[2])
.Aggregate(0U, (sum, v) => sum << 4 | v);
return(result.ToString("x"));
}
protected override string Part2(string[] input)
{
var N = 8;
var secret = input[0];
var finder = new Md5HashFinder(Md5HashFinder.Condition5x0);
var result = new char[N];
var found = 0;
foreach (var match in finder.FindMatches(secret, 0))
{
var pos = match.Hash[2];
var val = (byte)(match.Hash[3] >> 4);
if (pos < N && result[pos] == 0)
{
result[pos] = val.ToString("x").First();
if (++found == N)
{
break;
}
}
}
return(new string(result));
}
