import java.io.*;
import java.net.*;
import java.util.Scanner;
import java.sql.*;

public class Caja {  
   public static void main(String[] args ) {  
      try {  
         int port = Integer.parseInt(args[1]);
         Socket s = new Socket(args[0], port);
         Scanner in =new Scanner(s.getInputStream());
         Cambio cambio = new Cambio(in.nextDouble());

         System.out.println("Cambio inicial="+cambio.getPrecio());
         Venta venta =new Venta(cambio);
         venta.start();
         while(true)
            cambio.setPrecio(in.nextDouble());
      }
      catch (Exception e) {  
         e.printStackTrace();
      }
   }
}
class Cambio {
   private double precio;
   public Cambio (double p){
      precio=p;
   }
   public synchronized double getPrecio(){
      return precio;
   }
   public synchronized void setPrecio(double p){
      precio=p;
   }
}
class Venta extends Thread { 
   Cambio cambio;
   Scanner in;
   DB db;

   public Venta(Cambio c) { 
      cambio = c;
      in = new Scanner (System.in); 
      db = new DB();     
   }

   public void run() {  
      double amount;
      double total;
      while (true) {
         amount = in.nextDouble();
         if (amount <0) System.exit(0);
         total = amount*cambio.getPrecio();
         System.out.println(total);
         db.storeInDB((int)cambio.getPrecio(), (int) total);
      }
   }
}

class DB {
   private Statement sentencia;
   public DB() {
      Connection conexion;
    
      try {  // se carga el Driver JDBC
         Class.forName("org.mariadb.jdbc.Driver");  
      } catch( Exception e ) {
         System.out.println( "No se pudo cargar el driver" );
         e.printStackTrace();
         System.exit(-1);
      }
      try {
         conexion = DriverManager.getConnection("jdbc:mariadb://localhost/Ventas","root", "");
         System.out.println( "Conexión establecida" );
         sentencia = conexion.createStatement();
      }catch( Exception e ) { System.out.println( e );}
   }
   public void storeInDB(int precio, int total) {
      try {
         sentencia.executeUpdate( "INSERT INTO Valpo " +
                               "VALUES("+precio+","+total+")" );
      } catch( Exception e ) {System.out.println( e ); return;  }
    } 
}