import java.util.*;

public class sum
{
  static class X
  {
    double i, j, k;
  }

  private static final int SIZE = 1 << 24;
  static ArrayList<X> ax;

  public static void main( String args[] )
  {
    System.out.println( "press return to allocate ArrayList<X>" );
    System.console().readLine();

    ax = new ArrayList<X>( SIZE );

    for( int i = 0; i < SIZE; i ++ )
    {
      X x = new X();

      x.i = Math.random();
      x.j = Math.random();
      x.k = Math.random();
      ax.add( x );
    }

    System.out.println( "press return to make sum" );
    System.console().readLine();

    double result = 0.0;
    double t = System.nanoTime();

    for( int m = 2; m < 100; m++ )
      for( int i = 0; i < SIZE; i++ )
      {
    X x = ax.get( i );

    result += x.i * m;
    result += x.j * m;
    result += x.k * m;
      }

    t = System.nanoTime() - t;
    System.out.println( result );
    System.out.println( t / 1000000000.0 );
  }
}