Compilare: main.cpp: In member function 'void Trie::insert(std::string)': main.cpp:28:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In member function 'void Trie::erase(std::string)': main.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:48:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In member function 'int Trie::longest_prefix(std::string)': main.cpp:57:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In member function 'int Trie::count(std::string)': main.cpp:67:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In static member function 'static std::vector<int> Ratina::solve(std::vector<std::__cxx11::basic_string<char> >&, std::vector<std::vector<int> >&)': main.cpp:85:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for (int i = 0; i < a.size(); i++) { | ~~^~~~~~~~~~ main.cpp:88:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | for (int j = 1; j <= a[i].size(); j++) { | ~~^~~~~~~~~~~~~~ main.cpp:99:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for (int i = 1; i < w.size() && check; i++) { | ~~^~~~~~~~~~ main.cpp:100:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | if (mid >= h1[i - 1].size() || mid >= h1[i].size()) { | ~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:100:56: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | if (mid >= h1[i - 1].size() || mid >= h1[i].size()) { | ~~~~^~~~~~~~~~~~~~~