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 ans = 0 ;
  Arrays . sort ( a ) ;
  for ( int i = 1 ;
  i < N ;
  i ++ ) {
    long op = ( a [ i ] - a [ 0 ] ) / ( N + 1 ) ;
    ans += op ;
    a [ i ] -= op * ( N + 1 ) ;
  }
  for ( int i = 0 ;
  i < N ;
  i ++ ) a [ i ] += ans ;
  Arrays . sort ( a ) ;
  long op = Math . max ( 0 , a [ 0 ] - N ) ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) a [ i ] -= op ;
  ans += op * N ;
  int idx = N - 1 ;
  while ( true ) {
    if ( a [ idx ] <= N - 1 ) break ;
    ans ++ ;
    a [ idx ] -= N ;
    for ( int i = 0 ;
    i < N ;
    i ++ ) if ( i != idx ) a [ i ] ++ ;
    idx = ( idx - 1 + N ) % N ;
  }
  System . out . println ( ans ) ;
  sc . close ( ) ;
}

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 ans = 0 ; Arrays . sort ( a ) ; for ( int i = 1 ; i < N ; i ++ ) { long op = ( a [ i ] - a [ 0 ] ) / ( N + 1 ) ; ans += op ; a [ i ] -= op * ( N + 1 ) ; } for ( int i = 0 ; i < N ; i ++ ) a [ i ] += ans ; Arrays . sort ( a ) ; long op = Math . max ( 0 , a [ 0 ] - N ) ; for ( int i = 0 ; i < N ; i ++ ) a [ i ] -= op ; ans += op * N ; int idx = N - 1 ; while ( true ) { if ( a [ idx ] <= N - 1 ) break ; ans ++ ; a [ idx ] -= N ; for ( int i = 0 ; i < N ; i ++ ) if ( i != idx ) a [ i ] ++ ; idx = ( idx - 1 + N ) % N ; } System . out . println ( ans ) ; sc . close ( ) ; }
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