public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  long [ ] a = new long [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) a [ i ] = sc . nextLong ( ) ;
  sc . close ( ) ;
  long ans = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    long min = Math . max ( n , Arrays . stream ( a ) . min ( ) . getAsLong ( ) ) ;
    long div = ( a [ i ] - min ) / ( n + 1 ) ;
    ans += div ;
    a [ i ] -= div * n ;
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      if ( i == j ) continue ;
      a [ j ] += div ;
    }
  }
  long min = Arrays . stream ( a ) . min ( ) . getAsLong ( ) ;
  if ( min >= n ) {
    ans += ( min - n + 1 ) * n ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      a [ i ] -= ( min - n + 1 ) ;
    }
  }
  while ( true ) {
    int maxpos = 0 ;
    long max = Long . MIN_VALUE ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( a [ i ] > max ) {
        max = a [ i ] ;
        maxpos = i ;
      }
    }
    if ( max < n ) break ;
    ans ++ ;
    a [ maxpos ] -= n ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      if ( i == maxpos ) continue ;
      a [ i ] ++ ;
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; long [ ] a = new long [ n ] ; for ( int i = 0 ; i < n ; i ++ ) a [ i ] = sc . nextLong ( ) ; sc . close ( ) ; long ans = 0 ; for ( int i = 0 ; i < n ; i ++ ) { long min = Math . max ( n , Arrays . stream ( a ) . min ( ) . getAsLong ( ) ) ; long div = ( a [ i ] - min ) / ( n + 1 ) ; ans += div ; a [ i ] -= div * n ; for ( int j = 0 ; j < n ; j ++ ) { if ( i == j ) continue ; a [ j ] += div ; } } long min = Arrays . stream ( a ) . min ( ) . getAsLong ( ) ; if ( min >= n ) { ans += ( min - n + 1 ) * n ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] -= ( min - n + 1 ) ; } } while ( true ) { int maxpos = 0 ; long max = Long . MIN_VALUE ; for ( int i = 0 ; i < n ; i ++ ) { if ( a [ i ] > max ) { max = a [ i ] ; maxpos = i ; } } if ( max < n ) break ; ans ++ ; a [ maxpos ] -= n ; for ( int i = 0 ; i < n ; i ++ ) { if ( i == maxpos ) continue ; a [ i ] ++ ; } } System . out . println ( ans ) ; }
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