/in/foo.cc: In member function 'int Aho_Corasick_Automaton::insert(std::vector<int>&)':
/in/foo.cc:44:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0; i<s.size(); i++) {
                ~^~~~~~~~~
/in/foo.cc: In member function 'int Aho_Corasick_Automaton::match(std::vector<int>&, int)':
/in/foo.cc:74:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0; i<s.size(); i++) {
                ~^~~~~~~~~