/in/foo.cc: In function 'int main()':
/in/foo.cc:66:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int k=0;k<temp.size();k++){
                 ~^~~~~~~~~~~~
/in/foo.cc:75:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();i++){
              ~^~~~~~~~~