/in/foo.cc: In function 'int main()':
/in/foo.cc:22:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<va.size();i++)
          ~^~~~~~~~~~
/in/foo.cc:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=0;j<vb.size();j++)
               ~^~~~~~~~~~
/in/foo.cc:27:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(i=0;i<vc.size();i++)
          ~^~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', 'Data of problem 1048 not found.', 'nnu_contest', 1048)