       
    

   2014-07-28                

    7  12 13                             
  256                                                       
         128                                       
                                                                                64     32       16              8         4                      128    64    32   16    8     4                  4                
     32          2             

  
       
2015      
       
        
           
    
            
       16       
        
           
         
                               
               