Maximum Number of Balls in a Box LeetCode solution in C++

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class Solution {
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 public:
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  int countBalls(int lowLimit, int highLimit) {
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    vector<int> box(46, 0);
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    for (int i = lowLimit; i <= highLimit; i++) {
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      int sum = 0;
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      int temp = i;
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      while (temp) {
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        sum = sum + temp % 10;
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        temp = temp / 10;
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      }
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      box[sum]++;
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    }
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    return *max_element(box.begin(), box.end());
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  }
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};