List:
1 may be repeated to add
2. Using linear memory
3. Remove the deposit is consistent with the order
Set:
1. Add unrepeatable
2. Use the hash table storage
3. inconsistent with the stored sequence removed
List:
1 may be repeated to add
2. Using linear memory
3. Remove the deposit is consistent with the order
Set:
1. Add unrepeatable
2. Use the hash table storage
3. inconsistent with the stored sequence removed