public static void main ( String [ ] args ) {
  Scanner scan = new Scanner ( System . in ) ;
  int cases = scan . nextInt ( ) ;
  int e , r , n ;
  long result ;
  int [ ] maxE , minE ;
  ArrayList < Activity > activities = new ArrayList < Activity > ( ) ;
  for ( int c = 1 ;
  c <= cases ;
  c ++ ) {
    e = scan . nextInt ( ) ;
    r = scan . nextInt ( ) ;
    if ( r > e ) r = e ;
    n = scan . nextInt ( ) ;
    activities . clear ( ) ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) activities . add ( new Activity ( i , scan . nextInt ( ) ) ) ;
    Collections . sort ( activities ) ;
    maxE = new int [ n ] ;
    minE = new int [ n ] ;
    Arrays . fill ( maxE , e ) ;
    Arrays . fill ( minE , 0 ) ;
    result = 0 ;
    for ( Activity act : activities ) {
      result += ( maxE [ act . i ] - minE [ act . i ] ) * ( long ) act . v ;
      for ( int i = act . i + 1 , rNext = minE [ act . i ] + r ;
      i < n && rNext < maxE [ i ] ;
      i ++ , rNext += r ) maxE [ i ] = rNext ;
      for ( int i = act . i - 1 , rNext = maxE [ act . i ] - r ;
      i >= 0 && rNext >= minE [ i ] ;
      i -- , rNext -= r ) minE [ i ] = rNext ;
    }
    System . out . println ( "Case #" + c + ": " + result ) ;
  }
}

public static void main ( String [ ] args ) { Scanner scan = new Scanner ( System . in ) ; int cases = scan . nextInt ( ) ; int e , r , n ; long result ; int [ ] maxE , minE ; ArrayList < Activity > activities = new ArrayList < Activity > ( ) ; for ( int c = 1 ; c <= cases ; c ++ ) { e = scan . nextInt ( ) ; r = scan . nextInt ( ) ; if ( r > e ) r = e ; n = scan . nextInt ( ) ; activities . clear ( ) ; for ( int i = 0 ; i < n ; i ++ ) activities . add ( new Activity ( i , scan . nextInt ( ) ) ) ; Collections . sort ( activities ) ; maxE = new int [ n ] ; minE = new int [ n ] ; Arrays . fill ( maxE , e ) ; Arrays . fill ( minE , 0 ) ; result = 0 ; for ( Activity act : activities ) { result += ( maxE [ act . i ] - minE [ act . i ] ) * ( long ) act . v ; for ( int i = act . i + 1 , rNext = minE [ act . i ] + r ; i < n && rNext < maxE [ i ] ; i ++ , rNext += r ) maxE [ i ] = rNext ; for ( int i = act . i - 1 , rNext = maxE [ act . i ] - r ; i >= 0 && rNext >= minE [ i ] ; i -- , rNext -= r ) minE [ i ] = rNext ; } System . out . println ( " Case ▁ # " + c + " : ▁ " + result ) ; } }
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