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How to Solve Max Sum of a Pair With Equal Sum of Digits Problem
Master the Max Sum of a Pair With Equal Sum of Digits LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#2342
LeetCode ProblemMax Sum of a Pair With Equal Sum of Digits
You are given a 0-indexed array nums consisting of positive integers. You can choose two indices i and j, such that i != j, and the sum of digits of the number nums[i] is equal to that of nums[j]. Return the maximum value of nums[i] + nums[j] that you can obtain over all possible indices i and j that satisfy the conditions. If no such pair of indices exists, return -1.
ArrayHash TableSortingHeap (Priority Queue)
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Problem Breakdown
Understanding the Max Sum of a Pair With Equal Sum of Digits Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 0-indexed array nums consisting of positive integers. You can choose two indices i and j, such that i != j, and the sum of digits of the number nums[i] is equal to that of nums[j]. Return the maximum value of nums[i] + nums[j] that you can obtain over all possible indices i and j that satisfy the conditions. If no such pair of indices exists, return -1.
MediumProblem #2342
LeetCodeMax Sum of a Pair With Equal Sum of Digits
Related Topics
ArrayHash TableSortingHeap (Priority Queue)
How Phantom Code Helps
Get real-time assistance for Max Sum of a Pair With Equal Sum of Digits problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
nums = [18,43,36,13,7]
Output
54
# Example 2
Input
nums = [10,12,19,14]
Output
-1
Constraints
1 <= nums.length <= 105
1 <= nums[i] <= 109
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Solve Max Sum of a Pair With Equal Sum of Digits — You are given a 0-indexed array nums consisting of positive integers. You can ch...
Here's the optimal approach using Array:
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 Max Sum of a Pair With Equal Sum of Digits and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Max Sum of a Pair With Equal Sum of Digits 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 Max Sum of a Pair With Equal Sum of Digits?
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 Max Sum of a Pair With Equal Sum of Digits?
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 Max Sum of a Pair With Equal Sum of Digits 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 Max Sum of a Pair With Equal Sum of Digits 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 Max Sum of a Pair With Equal Sum of Digits 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 Max Sum of a Pair With Equal Sum of Digits 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 Max Sum of a Pair With Equal Sum of Digits 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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