/in/foo.cc: In function 'bool check(int, int)':
/in/foo.cc:10:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i=0;i<sen[p].size();i++)
      |                 ~^~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:49:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for(int i=0;i<sen.size();i++)
      |                 ~^~~~~~~~~~~
/in/foo.cc:70:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for(int i=0;i<sen.size();i++)
      |                 ~^~~~~~~~~~~