foo.cc: In function ‘int main()’:
foo.cc:19:43: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   19 |             for(int left=0,right=ans;right<s.size()&&find;left++,right++){
      |                                      ~~~~~^~~~~~~~~
foo.cc:25:15: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   25 |     cout<<(ans==s.size()?-1:ans);
      |            ~~~^~~~~~~~~~