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HomeLeetCode ProblemsFind X Value of Array I
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How to Solve Find X Value of Array I Problem

Master the Find X Value of Array I LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.

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Medium#3524
LeetCode Problem

Find X Value of Array I

You are given an array of positive integers nums, and a positive integer k. You are allowed to perform an operation once on nums, where in each operation you can remove any non-overlapping prefix and suffix from nums such that nums remains non-empty. You need to find the x-value of nums, which is the number of ways to perform this operation so that the product of the remaining elements leaves a remainder of x when divided by k. Return an array result of size k where result[x] is the x-value of nums for 0 <= x <= k - 1. A prefix of an array is a subarray that starts from the beginning of the array and extends to any point within it. A suffix of an array is a subarray that starts at any point within the array and extends to the end of the array. Note that the prefix and suffix to be chosen for the operation can be empty.

ArrayMathDynamic Programming

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Problem Breakdown

Understanding the Find X Value of Array I Problem

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

Problem Statement

You are given an array of positive integers nums, and a positive integer k. You are allowed to perform an operation once on nums, where in each operation you can remove any non-overlapping prefix and suffix from nums such that nums remains non-empty. You need to find the x-value of nums, which is the number of ways to perform this operation so that the product of the remaining elements leaves a remainder of x when divided by k. Return an array result of size k where result[x] is the x-value of nums for 0 <= x <= k - 1. A prefix of an array is a subarray that starts from the beginning of the array and extends to any point within it. A suffix of an array is a subarray that starts at any point within the array and extends to the end of the array. Note that the prefix and suffix to be chosen for the operation can be empty.

MediumProblem #3524
LeetCode

Find X Value of Array I

Related Topics

ArrayMathDynamic Programming

How Phantom Code Helps

Get real-time assistance for Find X Value of Array I problems during coding interviews. Phantom Code provides instant solutions and explanations.

Examples

# Example 1

Input
nums = [1,2,3,4,5], k = 3
Output
[9,2,4]

# Example 2

Input
nums = [1,2,4,8,16,32], k = 4
Output
[18,1,2,0]

# Example 3

Input
nums = [1,1,2,1,1], k = 2
Output
[9,6]

Constraints

1 <= nums[i] <= 109
1 <= nums.length <= 105
1 <= k <= 5

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Solve Find X Value of Array I — You are given an array of positive integers nums, and a positive integer k. You ...

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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Undetectability and technical details

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Platform compatibility and limitations

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Frequently Asked Questions

Common questions about solving Find X Value of Array I and using Phantom Code during coding interviews.

How does Phantom Code help me solve coding problems like Find X Value of Array I 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 Find X Value of Array I?
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 Find X Value of Array I?
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 Find X Value of Array I 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 Find X Value of Array I 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 Find X Value of Array I 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 Find X Value of Array I 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 Find X Value of Array I 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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