#include <iostream>
#include <vector>
#include <map>
using namespace std;
int main() {
    vector<int> v;
    v.push_back(1);
    v.push_back(2);
    v.pop_back();
    v.push_back(3);
    map<int, int> m;
    m.insert({1, 10});
    m[2] = 20;
    m.insert({1, 30});
    cout << v.size() + m.size() << endl;
    return 0;
}