Compilare: main.cpp: In function 'void zfunc(const string&, std::vector<int>&)': main.cpp:8:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | for (int i = 1; i < s.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:12:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | while (i + z[i] < s.size() && s[i + z[i]] == s[z[i]]) | ~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = a.size() + 1; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:32:14: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if (z[i] == a.size())