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Leetcode 3110. Score of a String

Problem Statement

A problem on LeetCode titled “Score of a String-out” (Problem ID 3110) requires you to compute the score of a given string based on specific rules. Your task is to implement a function that calculates this score given a string s. The rules for scoring the string are not provided in your request, so let’s make an assumption for the sake of crafting a solution.

Let’s assume the scoring rules are as follows (you can provide the actual rules if different):

  1. Each character in the string has a specific point value:
    • ‘a’ scores 1 point
    • ‘b’ scores 2 points
    • ‘c’ scores 3 points
    • …, and so forth.

Clarifying Questions

  1. Are the characters only lowercase a-z?
  2. Should we consider uppercase characters differently?
  3. Are there any special characters or constraints?
  4. Is the string always non-empty?
  5. Are there specific requirements about the approach or limitations on time/memory?

Strategy

Based on our assumed rules:

  1. Traverse the string character by character.
  2. For each character, add its corresponding point value to the total score.
  3. Return the final score.

Code Implementation

Given our assumptions, let’s write the C++ code.

#include <iostream>
#include <string>

int scoreOfString(const std::string& s) {
    // Initialize total score to 0
    int score = 0;

    // Traverse each character in the string 
    for (char c : s) {
        // Calculate the score as per the assumed rule c - 'a' + 1
        score += (c - 'a' + 1);
    }
    
    // Return the total score
    return score;
}

// Driver code for testing
int main() {
    std::string test_str = "abc";
    std::cout << "Score of the string \"" << test_str << "\" is: " << scoreOfString(test_str) << std::endl; // Expected output: 6
    return 0;
}

Time Complexity

The time complexity of this function is O(n), where n is the length of the string because we are traversing each character in the string exactly once to calculate the score.

Space Complexity

The space complexity is O(1) because we are only using a single integer variable score to store the total score, irrespective of the length of the string.

If you provide the exact rules or additional constraints, we can adjust this solution accordingly.

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