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3110. Score of a String 👍

  • Time: $O(n)$
  • Space: $O(1)$
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class Solution {
 public:
  int scoreOfString(string s) {
    int ans = 0;

    for (int i = 1; i < s.length(); ++i)
      ans += abs(s[i] - s[i - 1]);

    return ans;
  }
};

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class Solution {
  public int scoreOfString(String s) {
    int ans = 0;

    for (int i = 1; i < s.length(); ++i)
      ans += Math.abs(s.charAt(i) - s.charAt(i - 1));

    return ans;
  }
}

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class Solution:
  def scoreOfString(self, s: str) -> int:
    return sum(abs(ord(a) - ord(b))
               for a, b in itertools.pairwise(s))