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 ( ) ;
  long sum = 0 ;
  for ( long lo : a ) sum += lo ;
  long res = 0 ;
  while ( true ) {
    long [ ] b = new long [ n ] ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      long sho = a [ i ] / n ;
      a [ i ] %= n ;
      for ( int j = 0 ;
      j < n ;
      j ++ ) {
        if ( i == j ) continue ;
        b [ j ] += sho ;
      }
    }
    for ( int i = 0 ;
    i < n ;
    i ++ ) a [ i ] += b [ i ] ;
    boolean allzero = true ;
    for ( long lo : b ) if ( lo != 0 ) allzero = false ;
    if ( allzero ) break ;
  }
  for ( long lo : a ) sum -= lo ;
  System . out . println ( sum ) ;
}

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 ( ) ; long sum = 0 ; for ( long lo : a ) sum += lo ; long res = 0 ; while ( true ) { long [ ] b = new long [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { long sho = a [ i ] / n ; a [ i ] %= n ; for ( int j = 0 ; j < n ; j ++ ) { if ( i == j ) continue ; b [ j ] += sho ; } } for ( int i = 0 ; i < n ; i ++ ) a [ i ] += b [ i ] ; boolean allzero = true ; for ( long lo : b ) if ( lo != 0 ) allzero = false ; if ( allzero ) break ; } for ( long lo : a ) sum -= lo ; System . out . println ( sum ) ; }
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