public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int sum = 0 ;
  ArrayList < Integer > list = new ArrayList < Integer > ( ) ;
  int num = sc . nextInt ( ) ;
  for ( int n = 0 ;
  n < num ;
  n ++ ) {
    int bu = sc . nextInt ( ) ;
    if ( bu != 0 ) {
      list . add ( bu ) ;
      sum = sum + bu ;
    }
  }
  float a = ( sum + ( list . size ( ) - 1 ) ) / list . size ( ) ;
  int answer = ( int ) ( Math . ceil ( a ) ) ;
  System . out . println ( answer ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int sum = 0 ; ArrayList < Integer > list = new ArrayList < Integer > ( ) ; int num = sc . nextInt ( ) ; for ( int n = 0 ; n < num ; n ++ ) { int bu = sc . nextInt ( ) ; if ( bu != 0 ) { list . add ( bu ) ; sum = sum + bu ; } } float a = ( sum + ( list . size ( ) - 1 ) ) / list . size ( ) ; int answer = ( int ) ( Math . ceil ( a ) ) ; System . out . println ( answer ) ; }
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