Compilare: main.cpp: In function 'std::vector<int> lps(const std::string&)': main.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | while (i < pattern.length()) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'std::vector<int> kmp(const std::string&, const std::string&)': main.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | while (i < haystack.length()) { | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:49:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | if ( j == needle.length()) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:26: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare] 64 | for (int i =0; i < min(matches.size(), 1000ul); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~