#include <iostream> 
    #include <algorithm>
    #include <vector>
    using namespace std;
    int main ()
    {
        int FirstNum[] = {15, 100, 115, 200, 250};
        int SecondNum[] = {500, 400, 300, 200, 100};
        vector<int> VectorData(100);
        vector<int> :: iterator Iter;
        sort (FirstNum, FirstNum + 5);
        sort (SecondNum, SecondNum + 5);
        Iter = set_union (FirstNum, FirstNum + 5, SecondNum, SecondNum + 5, VectorData.begin());  
        VectorData.resize(Iter-VectorData.begin());
        for (Iter = VectorData.begin(); Iter != VectorData.end(); ++Iter)
        {
            cout << ' ' << *Iter;
        }
        return 0;
    }