/in/foo.cc: In function 'void ifequal(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
/in/foo.cc:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int i = 0; i < arr.size(); i++) {
      |                     ~~^~~~~~~~~~~~
/in/foo.cc: In function 'bool iftheend(std::vector<int>&, std::vector<int>&)':
/in/foo.cc:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int i = 0; i < arr.size(); i++) {
      |                     ~~^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:58:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |         for (int m = 0; m < arr.size(); m++) {
      |                         ~~^~~~~~~~~~~~