Minimum Changes To Make Alternating Binary String LeetCode solution in C++

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class Solution {
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 public:
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  int minOperations(string s) {
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    int n = s.size(), ans = 0;
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    for (int i = 0; i < n; i++) {
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      if (s[i] - '0' != i % 2) ans++;
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    }
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    return min(ans, n - ans);
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  }
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};