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Persona ng OA

匿名用户-L2Q1R  2024-5-9 21:50:41
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Plan your design according to the level specifications below:

    Level 1: The cloud storage system should support adding a new file and retrieving and deleting files.
    Level 2: The cloud storage system should support displaying the largest files.
    Level 3: The cloud storage system should support adding users with limited capacities and merging two users.
    Level 4: The cloud storage system should support backing up and restoring a user's files.

To move to the next level, you need to pass all the tests at this level.

Note

You will receive a list of queries to the system, and the final output should be an array of strings representing the returned values of all queries. Each query will only call one operation.

It is guaranteed that the given queries will never call operations that result in collisions between file and directory names.
Level 1

The cloud storage system should support file manipulation.

    ADD_FILE <name> <size> — should add a new file name to the storage. size is the amount of memory required in bytes. The current operation fails if a file with the same name already exists. Returns "true" if the file was added successfully or "false" otherwise.

    GET_FILE_SIZE <name> — should return a string representing the size of the file name if it exists, or an empty string otherwise.

    DELETE_FILE <name> — should delete the file name. Returns a string representing the deleted file size if the deletion was successful or an empty string if the file does not exist.

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;false"; the file "/dir1/dir2/file.txt" already exists
returns "10"
returns ""; the file "/not-existing.file" does not exist
returns "10"
returns ""; the file "/not-existing.file" does not exist

the output should be ["true", "false", "10", "", "10", ""].

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