/// grow - Increase capacity to hold 0 .. N-1, putting new integers in unique
/// equivalence classes.
/// This requires an uncompressed map.
void grow(unsigned N);
/// grow - Increase capacity to hold 0 .. N-1, putting new integers in unique
/// equivalence classes.
/// This requires an uncompressed map.
void grow(unsigned N);
/// join - Join the equivalence classes of a and b. After joining classes,
/// findLeader(a) == findLeader(b).
/// This requires an uncompressed map.
/// join - Join the equivalence classes of a and b. After joining classes,
/// findLeader(a) == findLeader(b).
/// This requires an uncompressed map.