public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  ArrayList < Integer > map = new ArrayList < Integer > ( ) ;
  HashMap < Integer , Integer > hm = new HashMap < Integer , Integer > ( ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    int j = sc . nextInt ( ) ;
    if ( ! hm . containsKey ( j ) ) {
      map . add ( j ) ;
      hm . put ( j , j ) ;
    }
  }
  Collections . sort ( map ) ;
  boolean found = false ;
  outer : for ( int i = 0 ;
  i < map . size ( ) ;
  i ++ ) {
    int first = map . get ( i ) * 2 ;
    for ( int j = i + 1 ;
    j < map . size ( ) ;
    j ++ ) {
      int second = map . get ( j ) ;
      if ( first > second ) {
        System . out . println ( "YES" ) ;
        found = true ;
        break outer ;
      }
    }
  }
  if ( ! found ) System . out . println ( "NO" ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; ArrayList < Integer > map = new ArrayList < Integer > ( ) ; HashMap < Integer , Integer > hm = new HashMap < Integer , Integer > ( ) ; for ( int i = 0 ; i < n ; i ++ ) { int j = sc . nextInt ( ) ; if ( ! hm . containsKey ( j ) ) { map . add ( j ) ; hm . put ( j , j ) ; } } Collections . sort ( map ) ; boolean found = false ; outer : for ( int i = 0 ; i < map . size ( ) ; i ++ ) { int first = map . get ( i ) * 2 ; for ( int j = i + 1 ; j < map . size ( ) ; j ++ ) { int second = map . get ( j ) ; if ( first > second ) { System . out . println ( " YES " ) ; found = true ; break outer ; } } } if ( ! found ) System . out . println ( " NO " ) ; }
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