for (int i=0;i<count;++i){
do { id = rand.nextInt(); } while(id == ZoieIndexReader.DELETED_UID || uidset.contains(id));
uidset.add(id);
}
long[] uidArray = uidset.toLongArray();
long[] even = new long[uidArray.length/2];
int[] ans = new int[even.length];
for (int i=0;i<even.length;++i){
even[i]=uidArray[i*2];