public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  n = sc . nextInt ( ) ;
  adj = new ArrayList [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) adj [ i ] = new ArrayList < Integer > ( ) ;
  for ( int u = 1 ;
  u < n ;
  u ++ ) {
    int v = sc . nextInt ( ) - 1 ;
    adj [ u ] . add ( v ) ;
    adj [ v ] . add ( u ) ;
  }
  c = new int [ n ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) c [ i ] = sc . nextInt ( ) ;
  for ( int u : adj [ 0 ] ) dfs ( 0 , u ) ;
  System . out . println ( sum ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; n = sc . nextInt ( ) ; adj = new ArrayList [ n ] ; for ( int i = 0 ; i < n ; i ++ ) adj [ i ] = new ArrayList < Integer > ( ) ; for ( int u = 1 ; u < n ; u ++ ) { int v = sc . nextInt ( ) - 1 ; adj [ u ] . add ( v ) ; adj [ v ] . add ( u ) ; } c = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) c [ i ] = sc . nextInt ( ) ; for ( int u : adj [ 0 ] ) dfs ( 0 , u ) ; System . out . println ( sum ) ; }
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