public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int k = sc . nextInt ( ) ;
  int [ ] arr = new int [ 12 ] ;
  for ( int i = 0 ;
  i < 12 ;
  i ++ ) arr [ i ] = sc . nextInt ( ) ;
  Arrays . sort ( arr ) ;
  int sum = 0 , ans = 0 ;
  for ( int i = 11 ;
  i >= 0 ;
  i -- ) {
    sum += arr [ i ] ;
    ++ ans ;
    if ( sum >= k ) break ;
  }
  if ( k == 0 ) System . out . println ( "0" ) ;
  else if ( sum < k ) System . out . println ( "-1" ) ;
  else System . out . println ( ans ) ;
  sc . close ( ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int k = sc . nextInt ( ) ; int [ ] arr = new int [ 12 ] ; for ( int i = 0 ; i < 12 ; i ++ ) arr [ i ] = sc . nextInt ( ) ; Arrays . sort ( arr ) ; int sum = 0 , ans = 0 ; for ( int i = 11 ; i >= 0 ; i -- ) { sum += arr [ i ] ; ++ ans ; if ( sum >= k ) break ; } if ( k == 0 ) System . out . println ( "0" ) ; else if ( sum < k ) System . out . println ( " - 1" ) ; else System . out . println ( ans ) ; sc . close ( ) ; }
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