# 385. Mini Parser LeetCode Solution | Easy Approach Share:

Mini Parser 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,]]"
Output: [123,[456,]]
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
```

Constraints:

• `1 <= s.length <= 5 * 104`
• `s` consists of digits, square brackets `"[]"`, negative sign `'-'`, and commas `','`.
• `s` is the serialization of valid `NestedInteger`.
• All the values in the input are in the range `[-106, 106]`.

Time: O(n)
Space: O(n)

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