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How to Solve Vowels of All Substrings Problem
Master the Vowels of All Substrings LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#2063
LeetCode ProblemVowels of All Substrings
Given a string word, return the sum of the number of vowels ('a', 'e', 'i', 'o', and 'u') in every substring of word. A substring is a contiguous (non-empty) sequence of characters within a string. Note: Due to the large constraints, the answer may not fit in a signed 32-bit integer. Please be careful during the calculations.
MathStringDynamic ProgrammingCombinatorics
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Problem Breakdown
Understanding the Vowels of All Substrings Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
Given a string word, return the sum of the number of vowels ('a', 'e', 'i', 'o', and 'u') in every substring of word. A substring is a contiguous (non-empty) sequence of characters within a string. Note: Due to the large constraints, the answer may not fit in a signed 32-bit integer. Please be careful during the calculations.
MediumProblem #2063
LeetCodeVowels of All Substrings
Related Topics
MathStringDynamic ProgrammingCombinatorics
How Phantom Code Helps
Get real-time assistance for Vowels of All Substrings problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
word = "aba"
Output
6
# Example 2
Input
word = "abc"
Output
3
# Example 3
Input
word = "ltcd"
Output
0
Constraints
1 <= word.length <= 105
word consists of lowercase English letters.
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Solve Vowels of All Substrings — Given a string word, return the sum of the number of vowels ('a', 'e', 'i', 'o',...
Here's the optimal approach using Math:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Vowels of All Substrings and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Vowels of All Substrings 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 Vowels of All Substrings?
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 Vowels of All Substrings?
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 Vowels of All Substrings 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 Vowels of All Substrings 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 Vowels of All Substrings 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 Vowels of All Substrings 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 Vowels of All Substrings 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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