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How to Solve K-th Smallest Prime Fraction Problem
Master the K-th Smallest Prime Fraction LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#786
LeetCode ProblemK-th Smallest Prime Fraction
You are given a sorted integer array arr containing 1 and prime numbers, where all the integers of arr are unique. You are also given an integer k. For every i and j where 0 <= i < j < arr.length, we consider the fraction arr[i] / arr[j]. Return the kth smallest fraction considered. Return your answer as an array of integers of size 2, where answer[0] == arr[i] and answer[1] == arr[j].
ArrayTwo PointersBinary SearchSortingHeap (Priority Queue)
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Problem Breakdown
Understanding the K-th Smallest Prime Fraction Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a sorted integer array arr containing 1 and prime numbers, where all the integers of arr are unique. You are also given an integer k. For every i and j where 0 <= i < j < arr.length, we consider the fraction arr[i] / arr[j]. Return the kth smallest fraction considered. Return your answer as an array of integers of size 2, where answer[0] == arr[i] and answer[1] == arr[j].
MediumProblem #786
LeetCodeK-th Smallest Prime Fraction
Related Topics
ArrayTwo PointersBinary SearchSortingHeap (Priority Queue)
How Phantom Code Helps
Get real-time assistance for K-th Smallest Prime Fraction problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
arr = [1,2,3,5], k = 3
Output
[2,5]
# Example 2
Input
arr = [1,7], k = 1
Output
[1,7]
Constraints
2 <= arr.length <= 1000
1 <= arr[i] <= 3 * 104
arr[0] == 1
arr[i] is a prime number for i > 0.
All the numbers of arr are unique and sorted in strictly increasing order.
1 <= k <= arr.length * (arr.length - 1) / 2
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Solve K-th Smallest Prime Fraction — You are given a sorted integer array arr containing 1 and prime numbers, where a...
Here's the optimal approach using Array:
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 K-th Smallest Prime Fraction and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like K-th Smallest Prime Fraction 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 K-th Smallest Prime Fraction?
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 K-th Smallest Prime Fraction?
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 K-th Smallest Prime Fraction 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 K-th Smallest Prime Fraction 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 K-th Smallest Prime Fraction 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 K-th Smallest Prime Fraction 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 K-th Smallest Prime Fraction 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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