30 #ifndef _BITS_OPT_RANDOM_H
31 #define _BITS_OPT_RANDOM_H 1
33 #pragma GCC system_header
36 namespace std _GLIBCXX_VISIBILITY (default)
38 _GLIBCXX_BEGIN_NAMESPACE_VERSION
43 _GLIBCXX_END_NAMESPACE_VERSION
ISO C++ entities toplevel namespace is std.