Compilare: main.cpp: In function 'std::vector<int> kmp(std::string, std::string)': main.cpp:15:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for (int i = 1, k = 0; i < w.size(); ++i) { | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:42:30: 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] 42 | for (int i = 0, j = 0; i < input_words.size(); i = j) { | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:43:18: 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] 43 | while (j < input_words.size() && input_words[i] == input_words[j]) { | ~~^~~~~~~~~~~~~~~~~~~~