public int SolvePart1(int numberOfElements, string lengths)
{
var hasher = new KnotHash();
var list = hasher.BuildListOfNumbers(numberOfElements);
var finalLengths = lengths.Split(',').Select(l => byte.Parse(l)).ToArray();
hasher.DoSingleRound(finalLengths, list, currentPosition: 0, skipSize: 0);
return(list[0] * list[1]);
}
public (int regions, int usedSquares) Count(string key)
{
var hasher = new KnotHash();
var usedSquares = 0;
var regions = 0;
var cells = new int[128, 128];
for (int row = 0; row < 128; row++)
{
var hash = hasher.CalculateHash($"{key}-{row}");
var binary = HashToBinary(hash);
for (int column = 0; column < 128; column++)
{
cells[column, row] = (binary[column] == '1' ? 0 : -1);
if (binary[column] == '1')
{
usedSquares++;
}
}
}
for (int row = 0; row < 128; row++)
{
for (int column = 0; column < 128; column++)
{
if (cells[column, row] == 0)
{
regions++;
cells[column, row] = regions;
//Look Right
if (column < 127)
{
ClearIfSet(cells, column + 1, row, regions);
}
//Look Down
if (row < 127)
{
ClearIfSet(cells, column, row + 1, regions);
}
}
}
}
return(usedSquares, regions);
}
public string CalculateHash(string given)
{
var hasher = new KnotHash();
return(hasher.CalculateHash(given));
}
