/in/foo.cc: In function 'long long int strint(std::__cxx11::string)':
/in/foo.cc:8:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<=a.size()-3;i++){
              ~^~~~~~~~~~~~
/in/foo.cc:7:13: warning: unused variable 'cnt' [-Wunused-variable]
  int temp=0,cnt=0,g=1;
             ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:27:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<=s.size()-2;i++){
               ~^~~~~~~~~~~~