Count Integers With Even Digit Sum LeetCode solution in C++

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class Solution {
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 public:
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  int countEven(int num) {
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    int temp = num, sum = 0;
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    while (num > 0) {
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      sum += num % 10;
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      num /= 10;
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    }
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    return sum % 2 == 0 ? temp / 2 : (temp - 1) / 2;
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  }
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};