public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int n = Integer . parseInt ( scanner . nextLine ( ) ) ;
  String [ ] a = scanner . nextLine ( ) . split ( " " ) ;
  scanner . close ( ) ;
  double haveBug = 0 ;
  double sumBug = 0 ;
  for ( String bugNumStr : a ) {
    int bugNum = Integer . parseInt ( bugNumStr ) ;
    if ( bugNum != 0 ) {
      haveBug ++ ;
      sumBug += bugNum ;
    }
  }
  double avg = sumBug / haveBug ;
  int avgCeiled = ( int ) Math . ceil ( avg ) ;
  System . out . println ( avgCeiled ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int n = Integer . parseInt ( scanner . nextLine ( ) ) ; String [ ] a = scanner . nextLine ( ) . split ( " ▁ " ) ; scanner . close ( ) ; double haveBug = 0 ; double sumBug = 0 ; for ( String bugNumStr : a ) { int bugNum = Integer . parseInt ( bugNumStr ) ; if ( bugNum != 0 ) { haveBug ++ ; sumBug += bugNum ; } } double avg = sumBug / haveBug ; int avgCeiled = ( int ) Math . ceil ( avg ) ; System . out . println ( avgCeiled ) ; }
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