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How to Solve Smallest Integer Divisible by K Problem
Master the Smallest Integer Divisible by K LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
Phantom Code generates complete solutions and debugging hints that you can use while explaining your approach, so you stay calm and in control.
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Start Free for WindowsMedium#1015
LeetCode ProblemSmallest Integer Divisible by K
Given a positive integer k, you need to find the length of the smallest positive integer n such that n is divisible by k, and n only contains the digit 1. Return the length of n. If there is no such n, return -1. Note: n may not fit in a 64-bit signed integer.
Hash TableMath
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Problem Breakdown
Understanding the Smallest Integer Divisible by K Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
Given a positive integer k, you need to find the length of the smallest positive integer n such that n is divisible by k, and n only contains the digit 1. Return the length of n. If there is no such n, return -1. Note: n may not fit in a 64-bit signed integer.
MediumProblem #1015
LeetCodeSmallest Integer Divisible by K
Related Topics
Hash TableMath
How Phantom Code Helps
Get real-time assistance for Smallest Integer Divisible by K problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
k = 1
Output
1
# Example 2
Input
k = 2
Output
-1
# Example 3
Input
k = 3
Output
3
Constraints
1 <= k <= 105
How Phantom Code Helps with LeetCode Problems
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Solve Smallest Integer Divisible by K — Given a positive integer k, you need to find the length of the smallest positive...
Here's the optimal approach using Hash Table:
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 Smallest Integer Divisible by K and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Smallest Integer Divisible by K 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 Smallest Integer Divisible by K?
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 Smallest Integer Divisible by K?
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 Smallest Integer Divisible by K 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 Smallest Integer Divisible by K 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 Smallest Integer Divisible by K 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 Smallest Integer Divisible by K 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 Smallest Integer Divisible by K 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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