#include <iostream>
    #include <algorithm>
    #include <vector>
    using namespace std;
    int main ()
    {
        int FirstData[] = {52, 101, 150, 200, 205};
        int SecondData[] = {20, 30, 120, 200, 102};
        vector<int> v(12);      
        vector<int> :: iterator Iter;
        sort (FirstData, FirstData + 5);   
        sort (SecondData, SecondData + 5); 
        Iter = set_union (FirstData, FirstData + 5, SecondData, SecondData + 5, v.begin());
        cout << int(Iter - v.begin());
        return 0;
    }