public Day14()
{
_map = new bool[128, 128];
for (int i = 0; i < 128; i++)
{
string hash = KnotHash.HashString($"{Seed}-{i}");
int col = 0;
foreach (char c in hash)
{
int num = c <= '9' ? c - '0' : c - 'a' + 10;
for (int bit = 3; bit >= 0; bit--)
{
_map[i, col++] = (num & (1 << bit)) != 0;
}
}
}
}
public void Part2()
{
string answer = KnotHash.HashString(_input);
Assert.Equal("541dc3180fd4b72881e39cf925a50253", answer);
}