/in/foo.c:11:30: warning: '-std=c++11' is not an option that controls warnings [-Wpragmas]
 #pragma GCC diagnostic error "-std=c++11"
                              ^~~~~~~~~~~~
/in/foo.c:59:24: fatal error: bits/stdc++.h: No such file or directory
 #include<bits/stdc++.h>
                        ^
compilation terminated.