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How to Solve Minimum Recolors to Get K Consecutive Black Blocks Problem
Master the Minimum Recolors to Get K Consecutive Black Blocks LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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LeetCode ProblemMinimum Recolors to Get K Consecutive Black Blocks
You are given a 0-indexed string blocks of length n, where blocks[i] is either 'W' or 'B', representing the color of the ith block. The characters 'W' and 'B' denote the colors white and black, respectively. You are also given an integer k, which is the desired number of consecutive black blocks. In one operation, you can recolor a white block such that it becomes a black block. Return the minimum number of operations needed such that there is at least one occurrence of k consecutive black blocks.
StringSliding Window
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Problem Breakdown
Understanding the Minimum Recolors to Get K Consecutive Black Blocks Problem
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Problem Statement
You are given a 0-indexed string blocks of length n, where blocks[i] is either 'W' or 'B', representing the color of the ith block. The characters 'W' and 'B' denote the colors white and black, respectively. You are also given an integer k, which is the desired number of consecutive black blocks. In one operation, you can recolor a white block such that it becomes a black block. Return the minimum number of operations needed such that there is at least one occurrence of k consecutive black blocks.
EasyProblem #2379
LeetCodeMinimum Recolors to Get K Consecutive Black Blocks
Related Topics
StringSliding Window
How Phantom Code Helps
Get real-time assistance for Minimum Recolors to Get K Consecutive Black Blocks problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
blocks = "WBBWWBBWBW", k = 7
Output
3
# Example 2
Input
blocks = "WBWBBBW", k = 2
Output
0
Constraints
n == blocks.length
1 <= n <= 100
blocks[i] is either 'W' or 'B'.
1 <= k <= n
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Solve Minimum Recolors to Get K Consecutive Black Blocks — You are given a 0-indexed string blocks of length n, where blocks[i] is either '...
Here's the optimal approach using String:
def solve(input):
# Optimal O(n) solution
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Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Minimum Recolors to Get K Consecutive Black Blocks and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Recolors to Get K Consecutive Black Blocks 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 Recolors to Get K Consecutive Black Blocks?
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 Recolors to Get K Consecutive Black Blocks?
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 Recolors to Get K Consecutive Black Blocks 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 Recolors to Get K Consecutive Black Blocks 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 Recolors to Get K Consecutive Black Blocks 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 Recolors to Get K Consecutive Black Blocks 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 Recolors to Get K Consecutive Black Blocks 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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