#include <iostream.h>

main()
{
  int in;

  cout << "Input som'in already: ";

  cin >> in;

  if (in < 500) {
    in = in * 100;
  }
  else if ((in > 500) && (in < 1000)) {
    in = in + 100;
    cout << "adding 100" << endl;
  }
  else {
    in = in / 10;
  }
 
  cout << "new value is: " << in << endl;
}