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How to Solve Flatten Nested List Iterator Problem
Master the Flatten Nested List Iterator LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#341
LeetCode ProblemFlatten Nested List Iterator
You are given a nested list of integers nestedList. Each element is either an integer or a list whose elements may also be integers or other lists. Implement an iterator to flatten it. Implement the NestedIterator class: Your code will be tested with the following pseudocode: If res matches the expected flattened list, then your code will be judged as correct.
StackTreeDepth-First SearchDesignQueueIterator
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Problem Breakdown
Understanding the Flatten Nested List Iterator Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a nested list of integers nestedList. Each element is either an integer or a list whose elements may also be integers or other lists. Implement an iterator to flatten it. Implement the NestedIterator class: Your code will be tested with the following pseudocode: If res matches the expected flattened list, then your code will be judged as correct.
MediumProblem #341
LeetCodeFlatten Nested List Iterator
Related Topics
StackTreeDepth-First SearchDesignQueueIterator
How Phantom Code Helps
Get real-time assistance for Flatten Nested List Iterator problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
—
Output
—
# Example 2
Input
nestedList = [[1,1],2,[1,1]]
Output
[1,1,2,1,1]
# Example 3
Input
nestedList = [1,[4,[6]]]
Output
[1,4,6]
Constraints
1 <= nestedList.length <= 500
The values of the integers in the nested list is in the range [-106, 106].
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Solve Flatten Nested List Iterator — You are given a nested list of integers nestedList. Each element is either an in...
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def solve(input):
# Optimal O(n) solution
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Frequently Asked Questions
Common questions about solving Flatten Nested List Iterator and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Flatten Nested List Iterator during interviews?
Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
What if the interviewer asks follow-up questions or modifications to problems like Flatten Nested List Iterator?
Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.
Can Phantom Code help me communicate my solution for problems like Flatten Nested List Iterator?
Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.
How does Phantom Code assist with different programming languages for Flatten Nested List Iterator type problems?
Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.
What coding mistakes does Phantom Code help me avoid during Flatten Nested List Iterator interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
Is Phantom Code detectable when solving problems like Flatten Nested List Iterator during live interviews?
No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.
How does Phantom Code help when I'm struggling with Flatten Nested List Iterator style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Flatten Nested List Iterator interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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