public static void main ( String [ ] args ) throws Exception {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  PrintWriter out = new PrintWriter ( System . out ) ;
  int n = Integer . parseInt ( br . readLine ( ) ) ;
  StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ;
  int [ ] from = new int [ n - 1 ] ;
  int [ ] to = new int [ n - 1 ] ;
  for ( int i = 0 ;
  i < n - 1 ;
  i ++ ) {
    int u = Integer . parseInt ( st . nextToken ( ) ) ;
    from [ i ] = u ;
    to [ i ] = i + 1 ;
  }
  int [ ] [ ] g = construct ( n , from , to ) ;
  ;
}

public static void main ( String [ ] args ) throws Exception { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; PrintWriter out = new PrintWriter ( System . out ) ; int n = Integer . parseInt ( br . readLine ( ) ) ; StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ; int [ ] from = new int [ n - 1 ] ; int [ ] to = new int [ n - 1 ] ; for ( int i = 0 ; i < n - 1 ; i ++ ) { int u = Integer . parseInt ( st . nextToken ( ) ) ; from [ i ] = u ; to [ i ] = i + 1 ; } int [ ] [ ] g = construct ( n , from , to ) ; ; }
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