// Getting JDK 1.2+ capapability in JDK 1.1
class MyRandom extends java.util.Random
   {
   public int nextInt ( int n )
      {
      if ( n <= 0 ) throw new IllegalArgumentException ( "n must be positive" );
      if ( ( n & -n ) == n )
         {
         // i.e., n is a power of 2
         return(int)(( n * (long)next( 31) ) >> 31 );
         }
      int bits, val;
      do
         {
         bits = next ( 31 );
         val = bits % n;
         }
      while ( bits - val + ( n - 1 ) < 0 );
      return val;
      }
   }