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How to Solve Sum of Scores of Built Strings Problem
Master the Sum of Scores of Built Strings LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsHard#2223
LeetCode ProblemSum of Scores of Built Strings
You are building a string s of length n one character at a time, prepending each new character to the front of the string. The strings are labeled from 1 to n, where the string with length i is labeled si. The score of si is the length of the longest common prefix between si and sn (Note that s == sn). Given the final string s, return the sum of the score of every si.
StringBinary SearchRolling HashSuffix ArrayString MatchingHash Function
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Problem Breakdown
Understanding the Sum of Scores of Built Strings Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are building a string s of length n one character at a time, prepending each new character to the front of the string. The strings are labeled from 1 to n, where the string with length i is labeled si. The score of si is the length of the longest common prefix between si and sn (Note that s == sn). Given the final string s, return the sum of the score of every si.
HardProblem #2223
LeetCodeSum of Scores of Built Strings
Related Topics
StringBinary SearchRolling HashSuffix ArrayString MatchingHash Function
How Phantom Code Helps
Get real-time assistance for Sum of Scores of Built Strings problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
s = "babab"
Output
9
# Example 2
Input
s = "azbazbzaz"
Output
14
Constraints
1 <= s.length <= 105
s consists of lowercase English letters.
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Solve Sum of Scores of Built Strings — You are building a string s of length n one character at a time, prepending each...
Here's the optimal approach using String:
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 Sum of Scores of Built Strings and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Sum of Scores of Built Strings 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 Sum of Scores of Built Strings?
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 Sum of Scores of Built Strings?
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 Sum of Scores of Built Strings 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 Sum of Scores of Built Strings 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 Sum of Scores of Built Strings 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 Sum of Scores of Built Strings 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 Sum of Scores of Built Strings 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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