foo.cc: In function ‘std::pair<std::vector<int>, std::__cxx11::basic_string<char> > dfs(std::unordered_map<std::__cxx11::basic_string<char>, std::pair<std::vector<int>, std::__cxx11::basic_string<char> > >&, std::vector<int>&, int, int)’:
foo.cc:54:34: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   54 |                     for(int i=2;i<left.first.size();i++) {
      |                                 ~^~~~~~~~~~~~~~~~~~
foo.cc:59:34: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   59 |                     for(int i=2;i<right.first.size();i++) {
      |                                 ~^~~~~~~~~~~~~~~~~~~
foo.cc: In function ‘void solve_1038(std::vector<int>&)’:
foo.cc:77:18: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   77 |     for(int i=2;i<res.first.size();i++) {
      |                 ~^~~~~~~~~~~~~~~~~
foo.cc:78:14: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
   78 |         if(i < res.first.size()-1) {
      |            ~~^~~~~~~~~~~~~~~~~~~~