Compilare: main.cpp: In function 'void AhoCorasick::insert(const std::string&, int)': main.cpp:32:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int i = 0; i < s.size(); ++i) { | ~~^~~~~~~~~~ main.cpp: In function 'void AhoCorasick::solve()': main.cpp:70:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for (int i = 0; i < a.size(); ++i) { | ~~^~~~~~~~~~