/in/foo.cc: In function 'bool AllisNum(std::__cxx11::string)':
/in/foo.cc:6:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i<s.size(); i++)
                   ^
/in/foo.cc:7:8: error: expected ';' before '{' token
 37     {
        ^
/in/foo.cc:28:1: warning: statement has no effect [-Wunused-value]
 }
 ^
/in/foo.cc:28:1: error: expected '}' at end of input
/in/foo.cc:28:1: warning: no return statement in function returning non-void [-Wreturn-type]