static List <BitSet> Generate(int length, params int[] runs)
{
var list = new List <BitSet>();
BitSet initial = BitSet.Empty;
int[] sums = new int[runs.Length];
sums[0] = 0;
for (int i = 1; i < runs.Length; i++)
{
sums[i] = sums[i - 1] + runs[i - 1] + 1;
}
for (int r = 0; r < runs.Length; r++)
{
initial = initial.AddRange(sums[r], runs[r]);
}
Generate(list, BitSet.Empty.Add(length), runs, sums, initial, 0, 0);
return(list);
}