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3

# Ninja And The List

Difficulty: MEDIUM
Contributed By
Avg. time to solve
24 min
Success Rate
78%

Problem Statement

#### Ninjas have asked to implement the following methods of the NestedIterator class.

``````NestedIterator(vector<NestedInteger> nestedList) Initializes the
iterator with the nested list nestedList.
int next() Returns the next integer in the nested list.
bool hasNext() Returns true if there are still some integers in the nested list and false otherwise.
``````

#### Your code will be tested with the following pseudocode:

``````initialize iterator with nestedList
while iterator.hasNext()
append iterator.next() to the end of answer
``````

#### You will get the correct answer verdict if the answer matches the expected flattened list.

##### EXAMPLE:
``````Input List: [[1, 1], 2, [1, 1]]
Output List: [1, 1, 2, 1, 1]
``````
##### Input Format :
``````The first line contains 'T', the number of test cases.
For each test case, there will be only one line in the input containing integers and some nested lists.
``````
##### Output format :
``````Print the second line containing the flattered nested list.
``````
##### Note :
``````You don't need to print anything. It has already been taken care of. Just implement the given class.
``````
##### Constraints :
``````1 <= 'T' <= 10
1 <= 'N' <= 10^5
0 <= Values of integers in the nested list <= 10^5
Time Limit: 1sec
``````
Console