Consecutive Characters LeetCode solution in C++

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class Solution {
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 public:
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  int ans = 1;
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  int maxPower(string s) {
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    for (int i = 0; i < size(s); ++i) {
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      int j = i;
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      while (j < size(s) and s[j] == s[i]) ++j;
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      ans = max(ans, j - i);
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      i = j - 1;
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    }
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    return ans;
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  }
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};