#include <ext/pb_ds/detail/basic_tree_policy/basic_tree_policy_base.hpp>
#include <ext/pb_ds/detail/basic_tree_policy/null_node_metadata.hpp>
-namespace pb_ds
+namespace __gnu_pbds
{
namespace detail
} // namespace detail
-} // namespace pb_ds
+} // namespace __gnu_pbds
#endif // #ifdef PB_DS_TREE_TRACE