<p>Given a string s represents the serialization of a nested list, implement a parser to deserialize it and return <em>the deserialized</em> <code>NestedInteger</code>.</p>

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

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> s = &quot;324&quot;
<strong>Output:</strong> 324
<strong>Explanation:</strong> You should return a NestedInteger object which contains a single integer 324.
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> s = &quot;[123,[456,[789]]]&quot;
<strong>Output:</strong> [123,[456,[789]]]
<strong>Explanation:</strong> 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
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= s.length &lt;= 5 * 10<sup>4</sup></code></li>
	<li><code>s</code> consists of digits, square brackets <code>&quot;[]&quot;</code>, negative sign <code>&#39;-&#39;</code>, and commas <code>&#39;,&#39;</code>.</li>
	<li><code>s</code> is the serialization of valid <code>NestedInteger</code>.</li>
	<li>All the values in the input are in the range <code>[-10<sup>6</sup>, 10<sup>6</sup>]</code>.</li>
</ul>

class NestedInteger:
    def __init__(self, value=None):
        if value is not None:
            if isinstance(value, list):
                self.nested_list = value
            else:
                self.integer = value

    def isInteger(self):
        return hasattr(self, 'integer')

    def getInteger(self):
        return self.integer if self.isInteger() else None

    def setInteger(self, value):
        self.integer = value

    def add(self, elem):
        if not hasattr(self, 'nested_list'):
            self.nested_list = []
        self.nested_list.append(elem)

    def getList(self):
        return self.nested_list if not self.isInteger() else None

class Solution:
    def deserialize(self, s: str) -> NestedInteger:
        def nestedInteger(x):
            if isinstance(x, int):
                return NestedInteger(x)
            return NestedInteger([nestedInteger(i) for i in x])

        import json
        return nestedInteger(json.loads(s))
18200