public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int a [ ] = new int [ n ] ;
  HashMap < Integer , Integer > hm = new HashMap < > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    a [ i ] = sc . nextInt ( ) ;
    hm . put ( a [ i ] , i + 1 ) ;
  }
  int min = Integer . MAX_VALUE ;
  int ans = 0 ;
  for ( Map . Entry < Integer , Integer > entry : hm . entrySet ( ) ) {
    int x = entry . getKey ( ) ;
    int y = entry . getValue ( ) ;
    if ( y < min ) {
      min = y ;
      ans = x ;
    }
  }
  System . out . println ( ans ) ;
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int a [ ] = new int [ n ] ; HashMap < Integer , Integer > hm = new HashMap < > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] = sc . nextInt ( ) ; hm . put ( a [ i ] , i + 1 ) ; } int min = Integer . MAX_VALUE ; int ans = 0 ; for ( Map . Entry < Integer , Integer > entry : hm . entrySet ( ) ) { int x = entry . getKey ( ) ; int y = entry . getValue ( ) ; if ( y < min ) { min = y ; ans = x ; } } System . out . println ( ans ) ; }
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