/in/foo.cc: In function 'int main()':
/in/foo.cc:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         for(int i=1;i<v.size()-1;i++){
      |                     ~^~~~~~~~~~~
/in/foo.cc:26:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         for(int i=1;i<v.size();i++){
      |                     ~^~~~~~~~~