public static void main ( String [ ] args ) throws Exception {
  BufferedReader in = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  PrintWriter out = new PrintWriter ( new BufferedOutputStream ( System . out ) ) ;
  int n = Integer . parseInt ( in . readLine ( ) ) ;
  StringTokenizer st = new StringTokenizer ( in . readLine ( ) ) ;
  ArrayList < Integer > nums = new ArrayList < Integer > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int num = Integer . parseInt ( st . nextToken ( ) ) ;
    nums . add ( num ) ;
  }
  Collections . sort ( nums ) ;
  int last = nums . remove ( 0 ) ;
  int count = 0 ;
  for ( int i = 1 ;
  i < n ;
  i ++ ) {
    int next = - 1 ;
    for ( int j = 0 ;
    j < nums . size ( ) ;
    j ++ ) {
      if ( nums . get ( j ) > last ) {
        next = j ;
        break ;
      }
    }
    if ( next != - 1 ) {
      last = nums . remove ( next ) ;
      count ++ ;
    }
    else {
      last = nums . remove ( 0 ) ;
    }
  }
  out . println ( count ) ;
  in . close ( ) ;
  out . close ( ) ;
}

public static void main ( String [ ] args ) throws Exception { BufferedReader in = new BufferedReader ( new InputStreamReader ( System . in ) ) ; PrintWriter out = new PrintWriter ( new BufferedOutputStream ( System . out ) ) ; int n = Integer . parseInt ( in . readLine ( ) ) ; StringTokenizer st = new StringTokenizer ( in . readLine ( ) ) ; ArrayList < Integer > nums = new ArrayList < Integer > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int num = Integer . parseInt ( st . nextToken ( ) ) ; nums . add ( num ) ; } Collections . sort ( nums ) ; int last = nums . remove ( 0 ) ; int count = 0 ; for ( int i = 1 ; i < n ; i ++ ) { int next = - 1 ; for ( int j = 0 ; j < nums . size ( ) ; j ++ ) { if ( nums . get ( j ) > last ) { next = j ; break ; } } if ( next != - 1 ) { last = nums . remove ( next ) ; count ++ ; } else { last = nums . remove ( 0 ) ; } } out . println ( count ) ; in . close ( ) ; out . close ( ) ; }
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