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How to Solve Construct String with Minimum Cost Problem
Master the Construct String with Minimum Cost 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 WindowsHard#3213
LeetCode ProblemConstruct String with Minimum Cost
You are given a string target, an array of strings words, and an integer array costs, both arrays of the same length. Imagine an empty string s. You can perform the following operation any number of times (including zero): Return the minimum cost to make s equal to target. If it's not possible, return -1.
ArrayStringDynamic ProgrammingSuffix Array
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Problem Breakdown
Understanding the Construct String with Minimum Cost Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a string target, an array of strings words, and an integer array costs, both arrays of the same length. Imagine an empty string s. You can perform the following operation any number of times (including zero): Return the minimum cost to make s equal to target. If it's not possible, return -1.
HardProblem #3213
LeetCodeConstruct String with Minimum Cost
Related Topics
ArrayStringDynamic ProgrammingSuffix Array
How Phantom Code Helps
Get real-time assistance for Construct String with Minimum Cost problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
target = "abcdef", words = ["abdef","abc","d","def","ef"], costs = [100,1,1,10,5]
Output
7
# Example 2
Input
target = "aaaa", words = ["z","zz","zzz"], costs = [1,10,100]
Output
-1
Constraints
1 <= target.length <= 5 * 104
1 <= words.length == costs.length <= 5 * 104
1 <= words[i].length <= target.length
The total sum of words[i].length is less than or equal to 5 * 104.
target and words[i] consist only of lowercase English letters.
1 <= costs[i] <= 104
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Solve Construct String with Minimum Cost — You are given a string target, an array of strings words, and an integer array c...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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Undetectability Checklist
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Undetectability and technical details
Our native desktop architecture avoids common detection vectors used by browser extensions. We provide a clear checklist so you can run basic checks and confirm the app will be invisible.
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Frequently Asked Questions
Common questions about solving Construct String with Minimum Cost and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Construct String with Minimum Cost 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 Construct String with Minimum Cost?
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 Construct String with Minimum Cost?
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 Construct String with Minimum Cost 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 Construct String with Minimum Cost 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 Construct String with Minimum Cost 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 Construct String with Minimum Cost 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 Construct String with Minimum Cost 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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