/in/foo.cc: In function 'int findI(std::vector<int>&, int&, int&)':
/in/foo.cc:60:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         for(int i = 0; i < arr.size(); i++)
      |                        ~~^~~~~~~~~~~~