// add all items to copy of heap
// takes linear time since already in heap order so no Keys move
public HeapIndexMinPQEnumerator(int n, int[] pq, T[] keys)
{
_copy = new IndexMinPQ <T>(pq.Length - 1);
for (var i = 1; i <= n; i++)
{
_copy.Insert(pq[i], keys[pq[i]]);
}
}
public Multiway(List <List <string> > lists)
{
var n = lists.Sum(l => l.Count);
_n = n;
_pq = new IndexMinPQ <string>(n);
foreach (var list in lists)
{
InsertWords(list);
}
}