Compilare: main.cpp: In member function 'void trie::insert(const std::string&, int, trie*, int)': main.cpp:28:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if(index==s.size()) | ~~~~~^~~~~~~~~~ main.cpp: In function 'int solve(const std::vector<int>&)': main.cpp:54:32: warning: comparison of integer expressions of different signedness: 'std::vector<trie*>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 54 | if(pos[query[0]].size()<=i+l)continue; | ~~~~~~~~~~~~~~~~~~~~^~~~~ main.cpp:56:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int j=1; j<query.size(); ++j) | ~^~~~~~~~~~~~~ main.cpp:57:36: warning: comparison of integer expressions of different signedness: 'std::vector<trie*>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 57 | if(pos[query[j]].size()<=i+l || pos[query[j]][i+l]!=pos[query[0]][i+l]) | ~~~~~~~~~~~~~~~~~~~~^~~~~