/in/foo.cc: In function 'long long int mak_num(std::__cxx11::string)':
/in/foo.cc:24:20: warning: array subscript has type 'char' [-Wchar-subscripts]
         if(ct[v[tp]]){
                    ^
/in/foo.cc:25:24: warning: array subscript has type 'char' [-Wchar-subscripts]
             if(ct[v[tp]]>bef||v[tp]=='('){
                        ^
/in/foo.cc:27:29: warning: array subscript has type 'char' [-Wchar-subscripts]
                 bef=ct[v[tp]];
                             ^
/in/foo.cc:41:33: warning: array subscript has type 'char' [-Wchar-subscripts]
                     bef=ct[v[tp]];
                                 ^
/in/foo.cc: In function 'long long int cal(long long int, long long int, char)':
/in/foo.cc:20:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^