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How to Solve Minimum Deletions to Make Character Frequencies Unique Problem
Master the Minimum Deletions to Make Character Frequencies Unique LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#1647
LeetCode ProblemMinimum Deletions to Make Character Frequencies Unique
A string s is called good if there are no two different characters in s that have the same frequency. Given a string s, return the minimum number of characters you need to delete to make s good. The frequency of a character in a string is the number of times it appears in the string. For example, in the string "aab", the frequency of 'a' is 2, while the frequency of 'b' is 1.
Hash TableStringGreedySorting
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Problem Breakdown
Understanding the Minimum Deletions to Make Character Frequencies Unique Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
A string s is called good if there are no two different characters in s that have the same frequency. Given a string s, return the minimum number of characters you need to delete to make s good. The frequency of a character in a string is the number of times it appears in the string. For example, in the string "aab", the frequency of 'a' is 2, while the frequency of 'b' is 1.
MediumProblem #1647
LeetCodeMinimum Deletions to Make Character Frequencies Unique
Related Topics
Hash TableStringGreedySorting
How Phantom Code Helps
Get real-time assistance for Minimum Deletions to Make Character Frequencies Unique problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
s = "aab"
Output
0
# Example 2
Input
s = "aaabbbcc"
Output
2
# Example 3
Input
s = "ceabaacb"
Output
2
Constraints
1 <= s.length <= 105
s contains only lowercase English letters.
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Solve Minimum Deletions to Make Character Frequencies Unique — A string s is called good if there are no two different characters in s that hav...
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def solve(input):
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Frequently Asked Questions
Common questions about solving Minimum Deletions to Make Character Frequencies Unique and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Deletions to Make Character Frequencies Unique 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 to Make Character Frequencies Unique?
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 to Make Character Frequencies Unique?
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 to Make Character Frequencies Unique 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 to Make Character Frequencies Unique 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 to Make Character Frequencies Unique 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 to Make Character Frequencies Unique 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 to Make Character Frequencies Unique 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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