public static void main ( String [ ] args ) throws IOException {
  FastReader in = new FastReader ( System . in ) ;
  PrintWriter pw = new PrintWriter ( System . out ) ;
  int n = in . nextInt ( ) , k = in . nextInt ( ) ;
  ArrayList < Long > list = new ArrayList < > ( ) ;
  HashSet < Long > set = new HashSet < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    Long a = in . nextLong ( ) ;
    if ( set . contains ( a ) ) continue ;
    list . add ( a ) ;
    set . add ( a ) ;
  }
  pw . println ( solve ( list , list . size ( ) , k ) ) ;
  pw . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { FastReader in = new FastReader ( System . in ) ; PrintWriter pw = new PrintWriter ( System . out ) ; int n = in . nextInt ( ) , k = in . nextInt ( ) ; ArrayList < Long > list = new ArrayList < > ( ) ; HashSet < Long > set = new HashSet < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { Long a = in . nextLong ( ) ; if ( set . contains ( a ) ) continue ; list . add ( a ) ; set . add ( a ) ; } pw . println ( solve ( list , list . size ( ) , k ) ) ; pw . close ( ) ; }
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