public static void main ( String [ ] args ) {
  int n ;
  try ( Scanner s = new Scanner ( System . in ) ) {
    n = s . nextInt ( ) ;
  }
  String s = Integer . toHexString ( n ) . toUpperCase ( ) ;
  int k = 0 ;
  for ( char c : s . toCharArray ( ) ) {
    switch ( c ) {
      case '0' : case '4' : case '6' : case '9' : case 'A' : case 'D' : k ++ ;
      break ;
      case '8' : case 'B' : k += 2 ;
      break ;
    }
  }
  System . out . println ( k ) ;
}

public static void main ( String [ ] args ) { int n ; try ( Scanner s = new Scanner ( System . in ) ) { n = s . nextInt ( ) ; } String s = Integer . toHexString ( n ) . toUpperCase ( ) ; int k = 0 ; for ( char c : s . toCharArray ( ) ) { switch ( c ) { case '0' : case '4' : case '6' : case '9' : case ' A ' : case ' D ' : k ++ ; break ; case '8' : case ' B ' : k += 2 ; break ; } } System . out . println ( k ) ; }
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