poj2389

高精度，java做

View Code

   
     

    
      import
    
       java.util.
    
      *
    
      ;

    
      import
    
       java.io.
    
      *
    
      ;

    
      import
    
       java.math.
    
      *
    
      ;


    
      public
    
       
    
      class
    
       Main {
 
    
      static
    
       
    
      public
    
       
    
      void
    
       main(String args[]) 
    
      throws
    
       FileNotFoundException{
 Scanner cin 
    
      =
    
       
    
      new
    
       Scanner(
    
      new
    
       BufferedInputStream(System.in));
 
    
      //
    
      Scanner cin = new Scanner(new FileInputStream("t.txt"));
    
      

    
       String s1 
    
      =
    
       cin.next();
 String s2 
    
      =
    
       cin.next();
 BigInteger a 
    
      =
    
       
    
      new
    
       BigInteger(s1);
 BigInteger b 
    
      =
    
       
    
      new
    
       BigInteger(s2);
 System.out.println(a.multiply(b));
 }
}