public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  PrintWriter pw = new PrintWriter ( new BufferedWriter ( new OutputStreamWriter ( System . out ) ) ) ;
  StringTokenizer s = new StringTokenizer ( br . readLine ( ) ) ;
  int n = Integer . parseInt ( s . nextToken ( ) ) ;
  int k = Integer . parseInt ( s . nextToken ( ) ) ;
  s = new StringTokenizer ( br . readLine ( ) ) ;
  int ar [ ] = new int [ n ] ;
  int freq [ ] = new int [ n + 1 ] ;
  int last [ ] = new int [ n + 1 ] ;
  int next [ ] = new int [ n + 1 ] ;
  for ( int i = 0 ;
  i < ar . length ;
  i ++ ) {
    ar [ i ] = Integer . parseInt ( s . nextToken ( ) ) ;
    freq [ ar [ i ] ] ++ ;
  }
  Arrays . fill ( last , 82 ) ;
  int count = 0 ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    if ( freq [ i ] > 0 ) count ++ ;
  }
  if ( count <= k ) {
    pw . println ( count ) ;
    pw . close ( ) ;
  }
  for ( int i = n - 1 ;
  i >= 0 ;
  i -- ) {
    next [ i ] = last [ ar [ i ] ] ;
    last [ ar [ i ] ] = i ;
  };
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; PrintWriter pw = new PrintWriter ( new BufferedWriter ( new OutputStreamWriter ( System . out ) ) ) ; StringTokenizer s = new StringTokenizer ( br . readLine ( ) ) ; int n = Integer . parseInt ( s . nextToken ( ) ) ; int k = Integer . parseInt ( s . nextToken ( ) ) ; s = new StringTokenizer ( br . readLine ( ) ) ; int ar [ ] = new int [ n ] ; int freq [ ] = new int [ n + 1 ] ; int last [ ] = new int [ n + 1 ] ; int next [ ] = new int [ n + 1 ] ; for ( int i = 0 ; i < ar . length ; i ++ ) { ar [ i ] = Integer . parseInt ( s . nextToken ( ) ) ; freq [ ar [ i ] ] ++ ; } Arrays . fill ( last , 82 ) ; int count = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { if ( freq [ i ] > 0 ) count ++ ; } if ( count <= k ) { pw . println ( count ) ; pw . close ( ) ; } for ( int i = n - 1 ; i >= 0 ; i -- ) { next [ i ] = last [ ar [ i ] ] ; last [ ar [ i ] ] = i ; } ; }
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