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class Solution {
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 public:
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  int sumOddLengthSubarrays(vector<int> &arr) {
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    int sum = 0;
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    int sum1 = 0;
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    for (int i = 0; i < arr.size(); i++) {
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      int count = 0;
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      sum += arr[i];
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      for (int j = i; j < arr.size(); j++) {
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        sum1 += arr[j];
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        count++;
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        if (count % 2 != 0 and count != 1) sum += sum1;
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      }
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      sum1 = 0;
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    }
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    return sum;
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  }
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};