Minimum Time to Type Word Using Special Typewriter LeetCode solution in C++

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class Solution {
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 public:
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  int minTimeToType(string word) {
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    int res = word.size(), point = 'a';
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    for (auto ch : word) {
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      res += min(abs(ch - point), 26 - abs(point - ch));
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      point = ch;
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    }
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    return res;
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  }
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};