Container selection (container selection prompt)

1. IfProgramIf random element access is required, the vector or deque container should be used.

2. If the program must insert or delete elements in the middle of the container, the list container should be used.

3. If the program is not in the middle of the container, but inserts or deletes elements in the header or tail of the container, deque container should be used.

4. If you only need to insert an element in the middle of the container when reading the input and then randomly access the element, you can consider reading the element into a list container during the input, then the containers are re-sorted to make them suitable for sequential access, and then the sorted list containers are copied to a vector container.