/in/foo.cc: In function 'void Insert(std::vector<int>&, int)':
/in/foo.cc:7:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     for(i=0;i<va.size() && va[i]<x;i++);
      |             ~^~~~~~~~~~
/in/foo.cc: In function 'void Insert(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:26:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int i=0;i<va.size();i++)
      |                 ~^~~~~~~~~~