public static void main ( String [ ] args ) throws IOException {
  String name = "gcj2017/r1c/C-small-1" ;
  Scanner s = new Scanner ( new File ( name + ".in" ) ) ;
  int count = s . nextInt ( ) ;
  out = new PrintWriter ( new BufferedWriter ( new FileWriter ( name + ".out" ) ) ) ;
  for ( int ii = 1 ;
  ii <= count ;
  ii ++ ) {
    out . print ( "Case #" + ii + ": " ) ;
    int n = s . nextInt ( ) ;
    int k = s . nextInt ( ) ;
    double u = s . nextDouble ( ) ;
    double [ ] p = new double [ n ] ;
    for ( int i = 0 ;
    i < n ;
    i ++ ) {
      p [ i ] = s . nextDouble ( ) ;
    }
    double res = solve ( n , k , u , p ) ;
    out . print ( String . format ( "%.8f" , res ) ) ;
    out . println ( ) ;
  }
  out . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { String name = " gcj2017 / r1c / C - small - 1" ; Scanner s = new Scanner ( new File ( name + " . in " ) ) ; int count = s . nextInt ( ) ; out = new PrintWriter ( new BufferedWriter ( new FileWriter ( name + " . out " ) ) ) ; for ( int ii = 1 ; ii <= count ; ii ++ ) { out . print ( " Case ▁ # " + ii + " : ▁ " ) ; int n = s . nextInt ( ) ; int k = s . nextInt ( ) ; double u = s . nextDouble ( ) ; double [ ] p = new double [ n ] ; for ( int i = 0 ; i < n ; i ++ ) { p [ i ] = s . nextDouble ( ) ; } double res = solve ( n , k , u , p ) ; out . print ( String . format ( " % .8f " , res ) ) ; out . println ( ) ; } out . close ( ) ; }
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