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How to Solve Intervals Between Identical Elements Problem
Master the Intervals Between Identical Elements LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#2121
LeetCode ProblemIntervals Between Identical Elements
You are given a 0-indexed array of n integers arr. The interval between two elements in arr is defined as the absolute difference between their indices. More formally, the interval between arr[i] and arr[j] is |i - j|. Return an array intervals of length n where intervals[i] is the sum of intervals between arr[i] and each element in arr with the same value as arr[i]. Note: |x| is the absolute value of x. Example 1: Example 2: Constraints: Note: This question is the same as 2615: Sum of Distances.
ArrayHash TablePrefix Sum
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Problem Breakdown
Understanding the Intervals Between Identical Elements Problem
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Problem Statement
You are given a 0-indexed array of n integers arr. The interval between two elements in arr is defined as the absolute difference between their indices. More formally, the interval between arr[i] and arr[j] is |i - j|. Return an array intervals of length n where intervals[i] is the sum of intervals between arr[i] and each element in arr with the same value as arr[i]. Note: |x| is the absolute value of x. Example 1: Example 2: Constraints: Note: This question is the same as 2615: Sum of Distances.
MediumProblem #2121
LeetCodeIntervals Between Identical Elements
Related Topics
ArrayHash TablePrefix Sum
How Phantom Code Helps
Get real-time assistance for Intervals Between Identical Elements problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
arr = [2,1,3,1,2,3,3]
Output
[4,2,7,2,4,4,5]
# Example 2
Input
arr = [10,5,10,10]
Output
[5,0,3,4]
Constraints
n == arr.length
1 <= n <= 105
1 <= arr[i] <= 105
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Solve Intervals Between Identical Elements — You are given a 0-indexed array of n integers arr. The interval between two elem...
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def solve(input):
# Optimal O(n) solution
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Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Intervals Between Identical Elements and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Intervals Between Identical Elements 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 Intervals Between Identical Elements?
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 Intervals Between Identical Elements?
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 Intervals Between Identical Elements 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 Intervals Between Identical Elements 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 Intervals Between Identical Elements 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 Intervals Between Identical Elements 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 Intervals Between Identical Elements 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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