int Day1b()
{

    int currVal = 0;
    int currSum = 0;
    std::vector<int> inputs;
    std::vector<int> SumTill;

    // Open the file.
    std::fstream file;
    std::string inputFilePath = "../input/day1.txt";
    file.open(inputFilePath);

    std::string line;
    while (file >> currVal)
    {
        inputs.push_back(currVal);
        currSum += currVal;
        SumTill.push_back(currSum);
    }

    //close file.
    file.close();

    //run loop till result is found
    int result = 0;
    int lastvalue = SumTill.back();
    int lowestIterationCount = std::numeric_limits<int>::max();
    int lowestIndex = std::numeric_limits<int>::max();
    //check each result
    for (size_t i = 0; i < SumTill.size(); i++)
    {
        int first = SumTill[i];
        //check with each other result
        for (size_t j = i + 1; j < SumTill.size(); j++)
        {

            int second = SumTill[j];
            //validate
            if ((first - second) % lastvalue != 0)continue;

            int iterations = abs((first - second) / lastvalue);
            if (iterations > lowestIterationCount)continue;
            //remember if current best

            if (first < second && lastvalue > 0 || first > second && lastvalue < 0)
            {
                if (lowestIterationCount == iterations && i > lowestIndex)break;
                result = second;
                lowestIndex = i;
            }
            else
            {
                if (lowestIterationCount == iterations && j > lowestIndex)break;
                result = first;
                lowestIndex = j;
            }
            lowestIterationCount = iterations;
        }
    }

    return result;
}