public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int k = sc . nextInt ( ) ;
  Integer month [ ] = new Integer [ 12 ] ;
  for ( int i = 0 ;
  i < 12 ;
  i ++ ) {
    month [ i ] = sc . nextInt ( ) ;
  }
  Arrays . sort ( month , Collections . reverseOrder ( ) ) ;
  int current_grow = 0 ;
  int count = 0 ;
  for ( int i = 0 ;
  i < 12 ;
  i ++ ) {
    if ( current_grow >= k ) {
      break ;
    }
    else if ( i == 11 && ( current_grow += month [ i ] ) < k ) {
      count = - 1 ;
      break ;
    }
    current_grow += month [ i ] ;
    count ++ ;
  }
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int k = sc . nextInt ( ) ; Integer month [ ] = new Integer [ 12 ] ; for ( int i = 0 ; i < 12 ; i ++ ) { month [ i ] = sc . nextInt ( ) ; } Arrays . sort ( month , Collections . reverseOrder ( ) ) ; int current_grow = 0 ; int count = 0 ; for ( int i = 0 ; i < 12 ; i ++ ) { if ( current_grow >= k ) { break ; } else if ( i == 11 && ( current_grow += month [ i ] ) < k ) { count = - 1 ; break ; } current_grow += month [ i ] ; count ++ ; } System . out . println ( count ) ; }
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