// -*- C++ -*-
-// Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+// Copyright (C) 2005-2024 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
-// Foundation; either version 2, or (at your option) any later
+// Foundation; either version 3, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// General Public License for more details.
// You should have received a copy of the GNU General Public License
-// along with this library; see the file COPYING. If not, write to
-// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
-// MA 02111-1307, USA.
-
-// As a special exception, you may use this file as part of a free
-// software library without restriction. Specifically, if other files
-// instantiate templates or use macros or inline functions from this
-// file, or you compile this file and link it with other files to
-// produce an executable, this file does not by itself cause the
-// resulting executable to be covered by the GNU General Public
-// License. This exception does not however invalidate any other
-// reasons why the executable file might be covered by the GNU General
-// Public License.
+// along with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
#include <ext/pb_ds/hash_policy.hpp>
using namespace std;
-using namespace pb_ds;
+using namespace __gnu_pbds;
// A string hash functor.
-struct string_hash : public unary_function<string, size_t>
+struct string_hash
{
- inline size_t
+ size_t
operator()(string str) const
{
string::const_iterator b = str.begin();