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HomeLeetCode ProblemsLongest Substring Of All Vowels in Order
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How to Solve Longest Substring Of All Vowels in Order Problem

Master the Longest Substring Of All Vowels in Order LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.

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Medium#1839
LeetCode Problem

Longest Substring Of All Vowels in Order

A string is considered beautiful if it satisfies the following conditions: For example, strings "aeiou" and "aaaaaaeiiiioou" are considered beautiful, but "uaeio", "aeoiu", and "aaaeeeooo" are not beautiful. Given a string word consisting of English vowels, return the length of the longest beautiful substring of word. If no such substring exists, return 0. A substring is a contiguous sequence of characters in a string.

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Problem Breakdown

Understanding the Longest Substring Of All Vowels in Order Problem

Let's break down this LeetCode problem and understand what makes it challenging in interview settings.

Problem Statement

A string is considered beautiful if it satisfies the following conditions: For example, strings "aeiou" and "aaaaaaeiiiioou" are considered beautiful, but "uaeio", "aeoiu", and "aaaeeeooo" are not beautiful. Given a string word consisting of English vowels, return the length of the longest beautiful substring of word. If no such substring exists, return 0. A substring is a contiguous sequence of characters in a string.

MediumProblem #1839
LeetCode

Longest Substring Of All Vowels in Order

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How Phantom Code Helps

Get real-time assistance for Longest Substring Of All Vowels in Order problems during coding interviews. Phantom Code provides instant solutions and explanations.

Examples

# Example 1

Input
word = "aeiaaioaaaaeiiiiouuuooaauuaeiu"
Output
13

# Example 2

Input
word = "aeeeiiiioooauuuaeiou"
Output
5

# Example 3

Input
word = "a"
Output
0

Constraints

1 <= word.length <= 5 * 105
word consists of characters 'a', 'e', 'i', 'o', and 'u'.

How Phantom Code Helps with LeetCode Problems

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Solve Longest Substring Of All Vowels in Order — A string is considered beautiful if it satisfies the following conditions: For e...

Here's the optimal approach using String:

def solve(input):
# Optimal O(n) solution
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Time: O(n)  |  Space: O(n)

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Undetectability and technical details

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Platform compatibility and limitations

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Frequently Asked Questions

Common questions about solving Longest Substring Of All Vowels in Order and using Phantom Code during coding interviews.

How does Phantom Code help me solve coding problems like Longest Substring Of All Vowels in Order 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 Longest Substring Of All Vowels in Order?
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 Longest Substring Of All Vowels in Order?
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 Longest Substring Of All Vowels in Order 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 Longest Substring Of All Vowels in Order 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 Longest Substring Of All Vowels in Order 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 Longest Substring Of All Vowels in Order 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 Longest Substring Of All Vowels in Order 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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