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

int main() 
{
  vector<int> num {1, 2, 3, 4, 5};

  cout << "Initial Vector: ";

  for (const int& i : num) 
  {
    cout << i << "  ";
  }
  cout << "\n";

  // change elements at indexes 1 and 4
  num.at(1) = 9;
  num.at(4) = 7;

  cout << "\nUpdated Vector: ";

  for (const int& i : num) 
  {
    cout << i << "  ";
  }
  cout << "\n";

  return 0;
}