#include  <iostream>
  using namespace std;

int  main( ) {
  // Set hex as the basefield.
  cout.setf( ios_base::hex, ios_base::basefield );
  // Activate showbase.
  cout.setf( ios_base::showbase );
  cout << 100 << endl;
  // Deactivate showbase.
  cout.unsetf( ios_base::showbase );
  cout << 100 << endl;
  return( 0 );
}