foo.cc: In function 'void solution(std::__cxx11::string)':
foo.cc:34:11: error: 'branck' was not declared in this scope
     top = branck;
           ^~~~~~
foo.cc:34:11: note: suggested alternative: 'branch'
     top = branck;
           ^~~~~~
           branch
foo.cc:9:9: warning: unused variable 'branch' [-Wunused-variable]
     int branch = top;
         ^~~~~~

[Hydro](https://hydro.ac)提供评测服务