/in/foo.cc: In function 'int main()':
/in/foo.cc:8:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i=0;i<s.size() ;i++)
      |                 ~^~~~~~~~~
/in/foo.cc:11:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |         while(s[i]==s[j]&&j<s1.size() )
      |                           ~^~~~~~~~~~
/in/foo.cc:13:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |         if(j==s1.size())c++,i--;
      |            ~^~~~~~~~~~~
/in/foo.cc:10:17: warning: unused variable 'f' [-Wunused-variable]
   10 |         int j=0,f=0;
      |                 ^