Wrong Answer
/in/foo.cc:1:30: warning: '-std=c++11' is not an option that controls warnings [-Wpragmas]
#pragma GCC diagnostic error "-std=c++11"
^~~~~~~~~~~~
/in/foo.cc:1:30: warning: '-std=c++11' is not an option that controls warnings [-Wpragmas]
#pragma GCC diagnostic error "-std=c++11"
^~~~~~~~~~~~
