public static void main ( String args [ ] ) {
  Scanner in = new Scanner ( System . in ) ;
  int n = in . nextInt ( ) ;
  int m = in . nextInt ( ) ;
  int k = in . nextInt ( ) ;
  int a [ ] = new int [ n ] ;
  int c1 = 0 , c2 = 0 ;
  int ans = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    a [ i ] = in . nextInt ( ) ;
    if ( a [ i ] == 1 ) c1 ++ ;
    else c2 ++ ;
  }
  m -= c1 ;
  if ( m < 0 ) ans += Math . abs ( m ) ;
  c2 = ( m > 0 ) ? c2 - m : c2 ;
  k -= c2 ;
  if ( k < 0 ) ans += Math . abs ( k ) ;
  System . out . println ( ans ) ;
}

public static void main ( String args [ ] ) { Scanner in = new Scanner ( System . in ) ; int n = in . nextInt ( ) ; int m = in . nextInt ( ) ; int k = in . nextInt ( ) ; int a [ ] = new int [ n ] ; int c1 = 0 , c2 = 0 ; int ans = 0 ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] = in . nextInt ( ) ; if ( a [ i ] == 1 ) c1 ++ ; else c2 ++ ; } m -= c1 ; if ( m < 0 ) ans += Math . abs ( m ) ; c2 = ( m > 0 ) ? c2 - m : c2 ; k -= c2 ; if ( k < 0 ) ans += Math . abs ( k ) ; System . out . println ( ans ) ; }
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