foo.cc: In function 'void solution(std::__cxx11::string)':
foo.cc:35:11: error: 'branck' was not declared in this scope
     top = branck;
           ^~~~~~
foo.cc:35:11: note: suggested alternative: 'branch'
     top = branck;
           ^~~~~~
           branch
foo.cc:10:9: warning: unused variable 'branch' [-Wunused-variable]
     int branch = top;
         ^~~~~~

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