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How to Solve Minimum Adjacent Swaps to Reach the Kth Smallest Number Problem
Master the Minimum Adjacent Swaps to Reach the Kth Smallest Number LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#1850
LeetCode ProblemMinimum Adjacent Swaps to Reach the Kth Smallest Number
You are given a string num, representing a large integer, and an integer k. We call some integer wonderful if it is a permutation of the digits in num and is greater in value than num. There can be many wonderful integers. However, we only care about the smallest-valued ones. Return the minimum number of adjacent digit swaps that needs to be applied to num to reach the kth smallest wonderful integer. The tests are generated in such a way that kth smallest wonderful integer exists.
Two PointersStringGreedy
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Problem Breakdown
Understanding the Minimum Adjacent Swaps to Reach the Kth Smallest Number Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a string num, representing a large integer, and an integer k. We call some integer wonderful if it is a permutation of the digits in num and is greater in value than num. There can be many wonderful integers. However, we only care about the smallest-valued ones. Return the minimum number of adjacent digit swaps that needs to be applied to num to reach the kth smallest wonderful integer. The tests are generated in such a way that kth smallest wonderful integer exists.
MediumProblem #1850
LeetCodeMinimum Adjacent Swaps to Reach the Kth Smallest Number
Related Topics
Two PointersStringGreedy
How Phantom Code Helps
Get real-time assistance for Minimum Adjacent Swaps to Reach the Kth Smallest Number problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
num = "5489355142", k = 4
Output
2
# Example 2
Input
num = "11112", k = 4
Output
4
# Example 3
Input
num = "00123", k = 1
Output
1
Constraints
2 <= num.length <= 1000
1 <= k <= 1000
num only consists of digits.
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Solve Minimum Adjacent Swaps to Reach the Kth Smallest Number — You are given a string num, representing a large integer, and an integer k. We c...
Here's the optimal approach using Two Pointers:
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 Minimum Adjacent Swaps to Reach the Kth Smallest Number and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Adjacent Swaps to Reach the Kth Smallest Number 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 Minimum Adjacent Swaps to Reach the Kth Smallest Number?
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 Minimum Adjacent Swaps to Reach the Kth Smallest Number?
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 Minimum Adjacent Swaps to Reach the Kth Smallest Number 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 Minimum Adjacent Swaps to Reach the Kth Smallest Number 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 Minimum Adjacent Swaps to Reach the Kth Smallest Number 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 Minimum Adjacent Swaps to Reach the Kth Smallest Number 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 Minimum Adjacent Swaps to Reach the Kth Smallest Number 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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