vector < int > mergeArrays(vector < int > a, vector < int > b) {

    vector <int> result;

    int i=0, j=0;

    for(int k = 0; k<a.size(); ++k)
    {
        if(i>a.size()-1)
            result.push_back(b[j++]);
        else if(j>b.size()-1)
            result.push_back(a[i++]);
        else if(a[i] > b[j])
        {
            result.push_back(b[j++]);
        }
        else
        {
            result.push_back(a[i++]);
        }
    }

    return result;
}