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class Solution {
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 public:
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  int findPoisonedDuration(vector<int> &timeSeries, int duration) {
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    if (timeSeries.size() == 0) return 0;
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    int res = 0;
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    for (int i = 0; i < timeSeries.size() - 1; i++) {
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      if (timeSeries[i + 1] - timeSeries[i] < duration)
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        res += timeSeries[i + 1] - timeSeries[i];
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      else
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        res += duration;
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    }
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    return res + duration;
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  }
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};