/in/foo.cc: In function 'void SearchRm(std::vector<int>&, int)':
/in/foo.cc:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=0;i<va.size();i++)
      |                 ~^~~~~~~~~~
/in/foo.cc: In function 'std::vector<int> Differ(std::vector<int>&, std::vector<int>&)':
/in/foo.cc:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i=0;i<vb.size();i++)
      |                 ~^~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i=0;i<vc.size();i++)
      |                 ~^~~~~~~~~~