vector<int> ret;
if (numbers.empty())
{
return ret;
}</int>

int i = 0;
int j = 0;
for (; i < numbers.size(); ++i)
{
    for (j = i + 1; j < numbers.size(); ++j)
    {
    if (numbers[i] + numbers[j] == target)
    {
        ret.push_back(i + 1);
        ret.push_back(j + 1);
        break;
    }
    }
    if (ret.size() > 0)
    {
        break;
    }
}
return ret;