import java.util.Random;

public class CoinToss
{
   public static void main(String[] args)
   {
      Random r = new Random();
      double x;
      int n = 0;

      x = r.nextDouble();
      n++;

      while ( x < 0.5 )
      {
         x = r.nextDouble();
         n++;
      }

      System.out.println("# tosses = " + n );

   }
}