comefrom: <qiyuangong>401_Binary_Watch_1.java
code: public List<String> readBinaryWatch(int num) {
          List<String> times = new ArrayList<>();
          for (int h = 0; h < 12; h++)
              for (int m = 0; m < 60; m++)
                  if (Integer.bitCount(h * 64 + m) == num)
                      times.add(String.format("%d:%02d", h, m));
          return times; 
      }
masked: public List < String > var_1 ( int var_2 ) {
    List < String > var_5 = new ArrayList < > ( ) ;
    for ( int var_7 = 0 ;
    var_7 < 12 ;
    var_7 ++ ) for ( int var_9 = 0 ;
    var_9 < 60 ;
    var_9 ++ ) if ( Integer . bitCount ( var_7 * 64 + var_9 ) == var_2 ) var_5 . add ( String . format ( "%d:%02d" , var_7 , var_9 ) ) ;
    return var_5 ;
  }
  