#include <iostream>
#include <vector>
using namespace std;

int main () {
  vector<int> MyList(2);
  MyList[0]=1;
  MyList[1]=2;
  MyList.push_back(5);
  cout<<MyList[0]<<endl;
  cout<<MyList[1]<<endl;
  cout<<MyList[2]<<endl;
  cout<<MyList.size()<<endl;
  return 0;
}