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diff --git a/libstdc++-v3/include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp b/libstdc++-v3/include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp
new file mode 100644
index 00000000..9b70accd
--- /dev/null
+++ b/libstdc++-v3/include/ext/pb_ds/detail/rc_binomial_heap_/rc.hpp
@@ -0,0 +1,262 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009 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 3, or (at your option) any later
+// version.
+
+// This library is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file rc.hpp
+ * Contains a redundant (binary counter).
+ */
+
+#ifndef PB_DS_RC_HPP
+#define PB_DS_RC_HPP
+
+namespace __gnu_pbds
+{
+  namespace detail
+  {
+
+#define PB_DS_CLASS_T_DEC \
+    template<typename Node, class Allocator>
+
+#define PB_DS_CLASS_C_DEC \
+    rc<Node, Allocator>
+
+    template<typename Node, class Allocator>
+    class rc
+    {
+    private:
+      typedef Allocator allocator_type;
+
+      typedef typename allocator_type::size_type size_type;
+
+      typedef Node node;
+
+      typedef
+      typename allocator_type::template rebind<
+	node>::other::pointer
+      node_pointer;
+
+      typedef
+      typename allocator_type::template rebind<
+	node_pointer>::other::pointer
+      entry_pointer;
+
+      typedef
+      typename allocator_type::template rebind<
+	node_pointer>::other::const_pointer
+      const_entry_pointer;
+
+      enum
+	{
+	  max_entries = sizeof(size_type) << 3
+	};
+
+    public:
+      typedef node_pointer entry;
+
+      typedef const_entry_pointer const_iterator;
+
+    public:
+      rc();
+
+      rc(const PB_DS_CLASS_C_DEC& other);
+
+      inline void
+      swap(PB_DS_CLASS_C_DEC& other);
+
+      inline void
+      push(entry p_nd);
+
+      inline node_pointer
+      top() const;
+
+      inline void
+      pop();
+
+      inline bool
+      empty() const;
+
+      inline size_type
+      size() const;
+
+      void
+      clear();
+
+      const const_iterator
+      begin() const;
+
+      const const_iterator
+      end() const;
+
+#ifdef _GLIBCXX_DEBUG
+      void
+      assert_valid() const;
+#endif 
+
+#ifdef PB_DS_RC_BINOMIAL_HEAP_TRACE_
+      void
+      trace() const;
+#endif 
+
+    private:
+      node_pointer m_a_entries[max_entries];
+
+      size_type m_over_top;
+    };
+
+    PB_DS_CLASS_T_DEC
+    PB_DS_CLASS_C_DEC::
+    rc() : m_over_top(0)
+    { _GLIBCXX_DEBUG_ONLY(assert_valid();) }
+
+    PB_DS_CLASS_T_DEC
+    PB_DS_CLASS_C_DEC::
+    rc(const PB_DS_CLASS_C_DEC& other) : m_over_top(0)
+    { _GLIBCXX_DEBUG_ONLY(assert_valid();) }
+
+    PB_DS_CLASS_T_DEC
+    inline void
+    PB_DS_CLASS_C_DEC::
+    swap(PB_DS_CLASS_C_DEC& other)
+    {
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
+
+      const size_type over_top = std::max(m_over_top, other.m_over_top);
+
+      for (size_type i = 0; i < over_top; ++i)
+	std::swap(m_a_entries[i], other.m_a_entries[i]);
+
+      std::swap(m_over_top, other.m_over_top);
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      _GLIBCXX_DEBUG_ONLY(other.assert_valid();)
+     }
+
+    PB_DS_CLASS_T_DEC
+    inline void
+    PB_DS_CLASS_C_DEC::
+    push(entry p_nd)
+    {
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      _GLIBCXX_DEBUG_ASSERT(m_over_top < max_entries);
+      m_a_entries[m_over_top++] = p_nd;
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    }
+
+    PB_DS_CLASS_T_DEC
+    inline void
+    PB_DS_CLASS_C_DEC::
+    pop()
+    {
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      _GLIBCXX_DEBUG_ASSERT(!empty());
+      --m_over_top;
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    }
+
+    PB_DS_CLASS_T_DEC
+    inline typename PB_DS_CLASS_C_DEC::node_pointer
+    PB_DS_CLASS_C_DEC::
+    top() const
+    {
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      _GLIBCXX_DEBUG_ASSERT(!empty());
+      return *(m_a_entries + m_over_top - 1);
+    }
+
+    PB_DS_CLASS_T_DEC
+    inline bool
+    PB_DS_CLASS_C_DEC::
+    empty() const
+    {
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      return m_over_top == 0;
+    }
+
+    PB_DS_CLASS_T_DEC
+    inline typename PB_DS_CLASS_C_DEC::size_type
+    PB_DS_CLASS_C_DEC::
+    size() const
+    { return m_over_top; }
+
+    PB_DS_CLASS_T_DEC
+    void
+    PB_DS_CLASS_C_DEC::
+    clear()
+    {
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+      m_over_top = 0;
+      _GLIBCXX_DEBUG_ONLY(assert_valid();)
+    }
+
+    PB_DS_CLASS_T_DEC
+    const typename PB_DS_CLASS_C_DEC::const_iterator
+    PB_DS_CLASS_C_DEC::
+    begin() const
+    { return& m_a_entries[0]; }
+
+    PB_DS_CLASS_T_DEC
+    const typename PB_DS_CLASS_C_DEC::const_iterator
+    PB_DS_CLASS_C_DEC::
+    end() const
+    { return& m_a_entries[m_over_top]; }
+
+#ifdef _GLIBCXX_DEBUG
+    PB_DS_CLASS_T_DEC
+    void
+    PB_DS_CLASS_C_DEC::
+    assert_valid() const
+    { _GLIBCXX_DEBUG_ASSERT(m_over_top < max_entries); }
+#endif 
+
+#ifdef PB_DS_RC_BINOMIAL_HEAP_TRACE_
+    PB_DS_CLASS_T_DEC
+    void
+    PB_DS_CLASS_C_DEC::
+    trace() const
+    {
+      std::cout << "rc" << std::endl;
+      for (size_type i = 0; i < m_over_top; ++i)
+	std::cerr << m_a_entries[i] << std::endl;
+      std::cout << std::endl;
+    }
+#endif 
+
+#undef PB_DS_CLASS_T_DEC
+#undef PB_DS_CLASS_C_DEC
+
+} // namespace detail
+} // namespace __gnu_pbds
+
+#endif