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

vector <int> change_and_return(vector <int> a)
{
  int i;
  
  for (i = 0; i < a.size(); i++) a[i] = 30 + i;
  return a;
}

int main()
{
  vector <int> a(10), b;
  int i;

  for (i = 0; i < a.size(); i++) a[i] = 10+i;

  b = change_and_return(a);

  for (i = 0; i < a.size(); i++) {
    cout << "i: " << i << " - a[" << i << "]: " << a[i] << 
                          " - b[" << i << "]: " << b[i] << endl;
  }
}