Minimum Operations to Make Array Equal LeetCode solution in C++

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class Solution {
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 public:
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  int minOperations(int n) {
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    int s = 0;
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    for (int i = 0; i <= (n - 1) / 2; ++i) {
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      s += fabs(n - (2 * i + 1));
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    }
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    return s;
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  }
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};