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How to Solve Minimum Deletions for At Most K Distinct Characters Problem
Master the Minimum Deletions for At Most K Distinct Characters LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsEasy#3545
LeetCode ProblemMinimum Deletions for At Most K Distinct Characters
You are given a string s consisting of lowercase English letters, and an integer k. Your task is to delete some (possibly none) of the characters in the string so that the number of distinct characters in the resulting string is at most k. Return the minimum number of deletions required to achieve this.
Hash TableStringGreedySortingCounting
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Problem Breakdown
Understanding the Minimum Deletions for At Most K Distinct Characters Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a string s consisting of lowercase English letters, and an integer k. Your task is to delete some (possibly none) of the characters in the string so that the number of distinct characters in the resulting string is at most k. Return the minimum number of deletions required to achieve this.
EasyProblem #3545
LeetCodeMinimum Deletions for At Most K Distinct Characters
Related Topics
Hash TableStringGreedySortingCounting
How Phantom Code Helps
Get real-time assistance for Minimum Deletions for At Most K Distinct Characters problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
s = "abc", k = 2
Output
1
# Example 2
Input
s = "aabb", k = 2
Output
0
# Example 3
Input
s = "yyyzz", k = 1
Output
2
Constraints
1 <= s.length <= 16
1 <= k <= 16
s consists only of lowercase English letters.
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Solve Minimum Deletions for At Most K Distinct Characters — You are given a string s consisting of lowercase English letters, and an integer...
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 Minimum Deletions for At Most K Distinct Characters and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Deletions for At Most K Distinct Characters 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 Deletions for At Most K Distinct Characters?
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 Deletions for At Most K Distinct Characters?
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 Deletions for At Most K Distinct Characters 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 Deletions for At Most K Distinct Characters 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 Deletions for At Most K Distinct Characters 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 Deletions for At Most K Distinct Characters 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 Deletions for At Most K Distinct Characters 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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