Medium

Quiz

#385 Mini Parser

APPROACH

Given a string s represents the serialization of a nested list, implement a parser to deserialize it and return the deserialized NestedInteger.

Each element is either an integer or a list whose elements may also be integers or other lists.

Example 1:

Input: s = "324"

Output: 324

Explanation: You should return a NestedInteger object which contains a single integer 324.

Example 2:

Input: s = "[123,[456,[789]]]"

Output: [123,[456,[789]]]

Explanation: Return a NestedInteger object containing a nested list with 2 elements:

1. An integer containing value 123.

2. A nested list containing two elements:

i. An integer containing value 456.

ii. A nested list with one element:

a. An integer containing value 789

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What is the optimal approach for this problem?