

#if 1
 print 11
 #if 1
  print 21
  #if 1
   print 31
  #else
   print 30
  #endif
 #else
  print 3
 #endif
#else
 print 10
 #if 1
  print 20
 #else
  print 30
 #endif
#endif

;-------------------------
#if 0 	//

#if		;no error
#endif

#endif
