#include<iostream>
using namespace std;

int main()
{ cout << "How many items? >";
  int num;
  cin >> num;
  int array[num],idx;
  for(idx=0;idx < num;idx++)
    array[idx] = idx;
  for(int idx = 0;idx < num;idx++)
    cout << array[idx] << ' ';
  return 0;
}