public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int t = Integer . parseInt ( br . readLine ( ) ) ;
  for ( int i = 0 ;
  i < t ;
  i ++ ) {
    int [ ] rong0 = Arrays . stream ( br . readLine ( ) . split ( "\\s" ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ;
    int [ ] rong = Arrays . stream ( br . readLine ( ) . split ( "\\s" ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ;
    int n = rong0 [ 0 ] , k = rong0 [ 1 ] ;
    Integer [ ] newArray = new Integer [ rong . length ] ;
    int x = 0 ;
    for ( int value : rong ) {
      newArray [ x ++ ] = Integer . valueOf ( value ) ;
    }
    Arrays . sort ( newArray , Collections . reverseOrder ( ) ) ;
    long sum = 0 ;
    for ( int d = 0 ;
    d <= k ;
    d ++ ) {
      sum += newArray [ d ] ;
    }
    System . out . println ( sum ) ;
  }
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int t = Integer . parseInt ( br . readLine ( ) ) ; for ( int i = 0 ; i < t ; i ++ ) { int [ ] rong0 = Arrays . stream ( br . readLine ( ) . split ( " \\ s " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ; int [ ] rong = Arrays . stream ( br . readLine ( ) . split ( " \\ s " ) ) . mapToInt ( Integer :: parseInt ) . toArray ( ) ; int n = rong0 [ 0 ] , k = rong0 [ 1 ] ; Integer [ ] newArray = new Integer [ rong . length ] ; int x = 0 ; for ( int value : rong ) { newArray [ x ++ ] = Integer . valueOf ( value ) ; } Arrays . sort ( newArray , Collections . reverseOrder ( ) ) ; long sum = 0 ; for ( int d = 0 ; d <= k ; d ++ ) { sum += newArray [ d ] ; } System . out . println ( sum ) ; } }
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